07-30-2022, 02:44 AM
(07-30-2022, 01:05 AM)Jack Wrote: Pete, I looked at your demo and I couldn't figure out how I would use your math engine to perform any math problem, it's horrifically complex
suppose that I wanted to code a simple factorial
show me how simple it is with your math-engineCode: (Select All)input "n ";n
f=1
for i=1 to n
f=f*i
next
print f
I am signing off for the weekend, see you Sunday
Well it ain't made to be easy. It was made to be a calculator, but I just got rid of the extra stuff and used the sub, so here you go...
Code: (Select All)
_SCREENMOVE 0, 0
WIDTH 170, 25
start:
operator$ = "*"
' snconvert% = -1
INPUT "n "; n
f = 1
stringmatha$ = LTRIM$(STR$(f))
FOR i = 1 TO n
stringmathb$ = LTRIM$(STR$(i))
CALL stringmath(stringmatha$, operator$, stringmathb$, runningtotal$, snconvert%, round_total%, show_rounding%, comma_display%, currency_display%, limit&&)
stringmatha$ = runningtotal$
NEXT
PRINT "String Total: "; runningtotal$
PRINT: CLEAR: GOTO start
SUB stringmath (stringmatha$, operator$, stringmathb$, runningtotal$, snconvert%, round_total%, show_rounding%, comma_display%, currency_display%, limit&&)
stringmathround$ = ""
IF limit&& > 2147483640 THEN limit&& = 2147483640
IF limit&& = 0 THEN limit&& = 1700 ' Default.
IF RIGHT$(UCASE$(runningtotal$), 1) = "R" THEN runningtotal$ = MID$(runningtotal$, 1, LEN(runningtotal$) - 1) 'Strip off rounding designation.
' Check running total. If S.N. convert to numeric for operations.
IF INSTR(runningtotal$, ",") <> 0 OR INSTR(runningtotal$, "e") <> 0 THEN
holdstringmathb$ = stringmathb$
stringmathb$ = runningtotal$
IF INSTR(runningtotal$, ",") <> 0 THEN GOSUB comma_removal ELSE GOSUB scientific_to_numeric
runningtotal$ = stringmathb$: stringmathb$ = holdstringmathb$: holdstringmathb$ = ""
END IF
' Check input number. If S.N. convert to numeric for operations.
IF INSTR(UCASE$(stringmathb$), "D") <> 0 OR INSTR(UCASE$(stringmathb$), "E") <> 0 THEN
'''GOSUB validate_string_number
IF stringmathb$ = "invalid number" THEN EXIT SUB
GOSUB scientific_to_numeric
END IF
IF runningtotal$ = "" THEN
'''GOSUB validate_string_number
IF stringmathb$ = "invalid number" THEN EXIT SUB
IF LEFT$(stringmathb$, 1) = "-" THEN
stringmathb$ = MID$(stringmathb$, 2)
n2sign$ = "-"
ELSE
n2sign$ = ""
END IF
GOSUB limit_round_convert
IF stringmathb$ = "overflow" THEN
n2sign$ = "": PRINT "Validated: "; stringmathb$: EXIT SUB
END IF
runningtotal$ = n2sign$ + stringmathb$: n2sign$ = ""
IF stringmathround$ <> "" THEN runningtotal$ = runningtotal$ + stringmathround$
'''PRINT "Validated: "; runningtotal$
IF INSTR(LCASE$(stringmathb$), "e") <> 0 THEN BEEP: GOSUB scientific_to_numeric
ELSE
''' GOSUB validate_string_number
'''PRINT "Validated: "; stringmathb$
IF stringmathb$ = "invalid number" THEN EXIT SUB
IF INSTR(UCASE$(stringmathb$), "e") <> 0 THEN GOSUB scientific_to_numeric
END IF
IF runningtotal$ <> "" THEN stringmatha$ = runningtotal$
SELECT CASE operator$
CASE "+", "-"
string_add_subtract:
IF INSTR(stringmatha$, ".") <> 0 THEN ' Evaluate sum for decimal fraction.
sumplace& = LEN(stringmatha$) - INSTR(stringmatha$, ".")
stringmatha$ = MID$(stringmatha$, 1, INSTR(stringmatha$, ".") - 1) + MID$(stringmatha$, INSTR(stringmatha$, ".") + 1) ' Strip out decimal
END IF
IF INSTR(stringmathb$, ".") <> 0 THEN ' Evaluate number for decimal fraction.
numplace& = LEN(stringmathb$) - INSTR(stringmathb$, ".")
stringmathb$ = MID$(stringmathb$, 1, INSTR(stringmathb$, ".") - 1) + MID$(stringmathb$, INSTR(stringmathb$, ".") + 1) ' Strip out decimal
END IF
IF sumplace& > numplace& THEN addsubplace& = sumplace& ELSE addsubplace& = numplace&
IF sumplace& > addsubplace& THEN
stringmatha$ = stringmatha$ + STRING$(sumplace& - addsubplace&, "0")
ELSEIF addsubplace& > sumplace& THEN
stringmatha$ = stringmatha$ + STRING$(addsubplace& - sumplace&, "0")
END IF
IF numplace& > addsubplace& THEN
stringmathb$ = stringmathb$ + STRING$(numplace& - addsubplace&, "0")
ELSEIF addsubplace& > numplace& THEN
stringmathb$ = stringmathb$ + STRING$(addsubplace& - numplace&, "0")
END IF ' END Decimal evaluations.
IF LEFT$(stringmatha$, 1) = "-" THEN sign_input$ = "-" ELSE sign_input$ = "+"
IF LEFT$(stringmathb$, 1) = "-" THEN sign_total$ = "-" ELSE sign_total$ = "+"
addsubsign% = 0
SELECT CASE sign_input$ + operator$ + sign_total$
CASE "+++", "+--"
operator$ = "+"
IF LEFT$(stringmathb$, 1) = "-" THEN stringmathb$ = MID$(stringmathb$, 2)
CASE "++-", "+-+"
operator$ = "-"
IF LEFT$(stringmathb$, 1) = "-" THEN stringmathb$ = MID$(stringmathb$, 2)
IF VAL(stringmathb$) > VAL(stringmatha$) THEN SWAP stringmatha$, stringmathb$: addsubsign% = -1
CASE "---", "-++"
operator$ = "-"
IF LEFT$(stringmatha$, 1) = "-" THEN stringmatha$ = MID$(stringmatha$, 2)
IF LEFT$(stringmathb$, 1) = "-" THEN stringmathb$ = MID$(stringmathb$, 2)
IF VAL(stringmathb$) > VAL(stringmatha$) THEN SWAP stringmatha$, stringmathb$ ELSE addsubsign% = -1
CASE "--+", "-+-"
operator$ = "+"
IF LEFT$(stringmatha$, 1) = "-" THEN stringmatha$ = MID$(stringmatha$, 2)
IF LEFT$(stringmathb$, 1) = "-" THEN stringmathb$ = MID$(stringmathb$, 2)
addsubsign% = -1
END SELECT
IF LEN(stringmatha$) > LEN(stringmathb$) THEN
stringmathb$ = STRING$(LEN(stringmatha$) - LEN(stringmathb$), "0") + stringmathb$
ELSEIF LEN(stringmatha$) < LEN(stringmathb$) THEN
stringmatha$ = STRING$(LEN(stringmathb$) - LEN(stringmatha$), "0") + stringmatha$
END IF
addsubx1$ = ""
SELECT CASE operator$
CASE "+", "="
FOR addsubii& = LEN(stringmatha$) TO 1 STEP -1
addsubx1% = VAL(MID$(stringmatha$, addsubii&, 1)) + VAL(MID$(stringmathb$, addsubii&, 1)) + addsubcarry%
IF addsubx1% > 9 THEN addsubx1% = addsubx1% - 10: addsubcarry% = 1 ELSE addsubcarry% = 0
addsubx1$ = LTRIM$(STR$(addsubx1%)) + addsubx1$
NEXT
IF addsubcarry% THEN addsubx1$ = "1" + addsubx1$: addsubcarry% = 0
GOSUB replace_decimal
CASE "-"
FOR addsubii& = LEN(stringmatha$) TO 1 STEP -1
addsubx1% = VAL(MID$(stringmatha$, addsubii&, 1)) - VAL(MID$(stringmathb$, addsubii&, 1)) + addsubcarry%
IF addsubx1% < 0 THEN addsubx1% = addsubx1% + 10: addsubcarry% = -1 ELSE addsubcarry% = 0
addsubx1$ = LTRIM$(STR$(addsubx1%)) + addsubx1$
NEXT
IF addsubx1$ <> "" AND addsubx1$ <> STRING$(LEN(addsubx1$), "0") THEN GOSUB replace_decimal
DO UNTIL LEFT$(addsubx1$, 1) <> "0" ' Remove leading zeros.
addsubx1$ = MID$(addsubx1$, 2)
LOOP
IF addsubx1$ = "" THEN
addsubx1$ = "0": addsubsign% = 0
ELSE
IF addsubcarry% THEN addsubx1$ = "-" + addsubx1$: addsubcarry% = 0
END IF
END SELECT
IF addsubsign% THEN
IF LEFT$(addsubx1$, 1) = "-" THEN addsubx1$ = MID$(addsubx1$, 2) ELSE addsubx1$ = "-" + addsubx1$
END IF
stringmatha$ = addsubx1$: addsubx1$ = ""
IF operationdivision% THEN RETURN
stringmathb$ = stringmatha$: stringmatha$ = ""
IF LEFT$(stringmathb$, 1) = "-" THEN
stringmathb$ = MID$(stringmathb$, 2)
n2sign$ = "-"
ELSE
n2sign$ = ""
END IF
GOSUB limit_round_convert
IF stringmathb$ = "overflow" THEN n2sign$ = "": EXIT SUB
GOSUB sm_converter
runningtotal$ = n2sign$ + stringmathb$: n2sign$ = ""
CASE "*"
string_multiply:
fac1$ = stringmatha$: fac2$ = stringmathb$ ' Make numbers whole numbers and remove any - sign.
IF LEFT$(fac1$, 1) = "-" THEN fac1$ = MID$(fac1$, 2): m_sign% = -1
IF LEFT$(fac2$, 1) = "-" THEN fac2$ = MID$(fac2$, 2): IF m_sign% THEN m_sign% = 0 ELSE m_sign% = -1
IF INSTR(fac1$, ".") <> 0 THEN m_decimal_places& = LEN(fac1$) - INSTR(fac1$, "."): fac1$ = MID$(fac1$, 1, INSTR(fac1$, ".") - 1) + MID$(fac1$, INSTR(fac1$, ".") + 1)
IF INSTR(fac2$, ".") <> 0 THEN m_decimal_places& = m_decimal_places& + LEN(fac2$) - INSTR(fac2$, "."): fac2$ = MID$(fac2$, 1, INSTR(fac2$, ".") - 1) + MID$(fac2$, INSTR(fac2$, ".") + 1)
FOR m_i& = LEN(fac2$) TO 1 STEP -1 ' Multiply each charter top and bottom.
m_k& = m_l&
m_x2$ = MID$(fac2$, m_i&, 1)
FOR m_j& = LEN(fac1$) TO 1 STEP -1
m_x1$ = MID$(fac1$, m_j&, 1)
IF m_product$ <> "" THEN
m_add$ = LTRIM$(STR$(VAL(m_x1$) * VAL(m_x2$))) + STRING$(m_k&, "0")
m_t& = 0: m_xproduct$ = "": m_carry% = 0
DO ' Add multiplied characters together.
m_x3$ = MID$(m_add$, LEN(m_add$) - m_t&, 1)
m_x4$ = MID$(m_product$, LEN(m_product$) - m_t&, 1)
IF m_x3$ = "" AND m_x4$ = "" THEN
IF m_carry% THEN m_xproduct$ = "1" + m_xproduct$
EXIT DO
END IF
m_g% = VAL(m_x3$) + VAL(m_x4$) + m_carry%
IF m_g% >= 10 THEN m_g% = m_g% - 10: m_carry% = 1 ELSE m_carry% = 0
m_xproduct$ = LTRIM$(STR$(m_g%)) + m_xproduct$
m_t& = m_t& + 1
LOOP
m_product$ = m_xproduct$: m_xproduct$ = ""
ELSE
m_product$ = LTRIM$(STR$(VAL(m_x1$) * VAL(m_x2$))) + STRING$(m_k&, "0") ' First loop makes variable here.
END IF
m_k& = m_k& + 1 ' Adds trailing zeros multiplication
NEXT
m_l& = m_l& + 1 ' Used to reset value for m_k& adding one trailing zer for each loop.
NEXT
fac1$ = "": fac2$ = "": m_l& = 0: m_k& = 0: m_t& = 0
IF m_decimal_places& > LEN(m_product$) THEN m_product$ = STRING$(m_decimal_places& - LEN(m_product$), "0") + m_product$ ' Add any leading zeros to a decimal. Ex: .02 * .01 is factored as 002. It needs one leading zero before adding the decimal point, .0002.
IF m_decimal_places& AND m_product$ <> "0" THEN ' Replace any decimal point.
m_product$ = MID$(m_product$, 1, LEN(m_product$) - m_decimal_places&) + "." + MID$(m_product$, LEN(m_product$) - m_decimal_places& + 1)
END IF
DO UNTIL LEFT$(m_product$, 1) <> "0" ' Remove leading zeros.
m_product$ = MID$(m_product$, 2)
LOOP
IF m_decimal_places& THEN
DO UNTIL RIGHT$(m_product$, 1) <> "0" ' Remove trailing zeros in a decimal sum.
m_product$ = MID$(m_product$, 1, LEN(m_product$) - 1)
LOOP
END IF
IF m_product$ = "" THEN m_product$ = "0": m_sign% = 0
IF RIGHT$(m_product$, 1) = "." THEN m_product$ = MID$(m_product$, 1, LEN(m_product$) - 1) ' Remove decimal from the end of an integer total.
IF operationdivision% THEN m_sign% = 0: RETURN
stringmathb$ = m_product$: m_product$ = "": GOSUB limit_round_convert
IF stringmathb$ = "overflow" THEN EXIT SUB
GOSUB sm_converter
runningtotal$ = stringmathb$: stringmathb$ = ""
IF m_sign% THEN runningtotal$ = "-" + runningtotal$: m_sign% = 0
CASE "/"
operationdivision% = -1
divbuffer& = LEN(stringmathb$) - LEN(stringmatha$)
IF divbuffer& < 0 THEN divbuffer& = 0
d2dividend$ = stringmatha$
d1divisor$ = stringmathb$
IF LEFT$(d1divisor$, 1) = "0" AND LEN(d1divisor$) = 1 THEN PRINT "Division by zero not allowed.": END
IF LEFT$(d1divisor$, 1) = "-" THEN divsign% = -1: d1divisor$ = MID$(d1divisor$, 2)
IF LEFT$(d2dividend$, 1) = "-" THEN
IF divsign% THEN
divsign% = 0
ELSE
divsign% = -1
END IF
d2dividend$ = MID$(d2dividend$, 2)
END IF
IF INSTR(d1divisor$, ".") <> 0 THEN
DO UNTIL RIGHT$(d1divisor$, 1) <> "0"
d1divisor$ = MID$(d1divisor$, 1, LEN(d1divisor$) - 1) ' Strip off trailing zeros
LOOP
divplace& = LEN(d1divisor$) - INSTR(d1divisor$, ".")
d1divisor$ = MID$(d1divisor$, 1, INSTR(d1divisor$, ".") - 1) + MID$(d1divisor$, INSTR(d1divisor$, ".") + 1) ' Strip off decimal point.
DO UNTIL LEFT$(d1divisor$, 1) <> "0"
d1divisor$ = MID$(d1divisor$, 2) ' Strip off leading zeros for divisors smaller than .1
LOOP
END IF
IF INSTR(d2dividend$, ".") <> 0 THEN
d2dividend$ = d2dividend$ + STRING$(divplace& - LEN(d2dividend$) - INSTR(d2dividend$, "."), "0") ' Add any zeros based on the length of dividend at decimal - length of divisor at decimal. If less than zero, nothing added.
divplace2& = INSTR(d2dividend$, ".")
DO UNTIL RIGHT$(d2dividend$, 1) <> "0"
d2dividend$ = MID$(d2dividend$, 1, LEN(d2dividend$) - 1) ' Strip off trailing zeros
LOOP
d2dividend$ = MID$(d2dividend$, 1, INSTR(d2dividend$, ".") - 1) + MID$(d2dividend$, INSTR(d2dividend$, ".") + 1) ' Strip off decimal point.
ELSE
d2dividend$ = d2dividend$ + STRING$(divplace&, "0") ' Add any zeros based on the length of dividend at decimal - length of divisor at decimal. If less than zero, nothing added.
divplace& = 0
END IF
DO
DO
divremainder& = divremainder& + 1: divremainder$ = divremainder$ + MID$(d2dividend$, divremainder&, 1)
IF MID$(d2dividend$, divremainder&, 1) = "" THEN
IF divremainder$ = STRING$(LEN(divremainder$), "0") AND LEN(quotient$) > LEN(d2dividend$) THEN divflag% = -1: EXIT DO
divcarry& = divcarry& + 1
IF divcarry& = 1 THEN divplace3& = divremainder& - 1
IF divcarry& > limit&& + 1 + divbuffer& THEN
divflag% = -2: EXIT DO
END IF
divremainder$ = divremainder$ + "0" ' No more digits to bring down.
END IF
IF LEN(divremainder$) > LEN(d1divisor$) OR LEN(divremainder$) = LEN(d1divisor$) AND divremainder$ >= d1divisor$ THEN EXIT DO
quotient$ = quotient$ + "0"
LOOP
IF divflag% THEN divflag% = 0: EXIT DO
FOR div_i% = 9 TO 1 STEP -1
stringmatha$ = LTRIM$(STR$(div_i%)): stringmathb$ = d1divisor$
m_product$ = "": GOSUB string_multiply
tempcutd$ = divremainder$ ' divremainder$ can be 00 or other leading zero values.
DO
IF LEN(tempcutd$) = 1 THEN EXIT DO
IF LEFT$(tempcutd$, 1) = "0" THEN
tempcutd$ = MID$(tempcutd$, 2)
ELSE
EXIT DO
END IF
LOOP
IF LEN(tempcutd$) > LEN(m_product$) OR LEN(tempcutd$) = LEN(m_product$) AND m_product$ <= tempcutd$ THEN EXIT FOR
NEXT
quotient$ = quotient$ + LTRIM$(STR$(div_i%))
stringmatha$ = LTRIM$(STR$(div_i%)): stringmathb$ = d1divisor$
m_product$ = "": GOSUB string_multiply
operator$ = "-"
stringmatha$ = divremainder$
stringmathb$ = m_product$
GOSUB string_add_subtract
divremainder$ = stringmatha$
operator$ = "/"
LOOP
IF divplace& = 0 AND divplace2& = 0 THEN divplace& = divplace3&
IF divplace2& THEN divplace& = divplace& + divplace2& - 1
IF quotient$ = "" THEN divplace& = 0 ' dividend is zero.
IF divplace& OR divplace2& THEN
quotient$ = MID$(quotient$, 1, divplace&) + "." + MID$(quotient$, divplace& + 1)
DO UNTIL RIGHT$(quotient$, 1) <> "0"
quotient$ = MID$(quotient$, 1, LEN(quotient$) - 1) ' Strip off trailing zeros
LOOP
IF RIGHT$(quotient$, 1) = "." THEN quotient$ = MID$(quotient$, 1, LEN(quotient$) - 1) ' Strip off abandoned decimal.
END IF
DO UNTIL LEFT$(quotient$, 1) <> "0"
quotient$ = MID$(quotient$, 2) ' Strip off leading zeros
LOOP
IF quotient$ = "" THEN quotient$ = "0": divsign% = 0
operationdivision% = 0
stringmathb$ = quotient$: quotient$ = "": GOSUB limit_round_convert
IF stringmathb$ = "overflow" THEN divsign% = 0: EXIT SUB
GOSUB sm_converter
runningtotal$ = stringmathb$: stringmathb$ = ""
IF divsign% THEN runningtotal$ = "-" + runningtotal$
END SELECT
IF stringmathround$ <> "" THEN runningtotal$ = runningtotal$ + stringmathround$
EXIT SUB
validate_string_number:
vsn_negcnt& = 0: vsn_poscnt& = 0: vsn_depresent& = 0: decimalcnt& = 0: vsn_numberpresent& = 0: vsn_zerospresent& = 0
IF LEFT$(stringmathb$, 1) = "-" THEN stringmathb$ = MID$(stringmathb$, 2): sm_sign$ = "-" ELSE sm_sign$ = ""
IF LEFT$(stringmathb$, 1) = "+" THEN IF sm_sign$ <> "-" THEN stringmathb$ = MID$(stringmathb$, 2) ELSE stringmathb$ = "invalid number": RETURN
IF INSTR(UCASE$(stringmathb$), "D") OR INSTR(UCASE$(stringmathb$), "E") THEN ' Evaluate for Scientific Notation.
FOR sm_i& = 1 TO LEN(stringmathb$)
validatenum$ = MID$(UCASE$(stringmathb$), sm_i&, 1)
SELECT CASE validatenum$
CASE "+"
IF vsn_depresent& THEN vsn_poscnt& = vsn_poscnt& + 1 ELSE stringmathb$ = "invalid number": RETURN
CASE "-"
IF vsn_depresent& THEN vsn_negcnt& = vsn_negcnt& + 1 ELSE stringmathb$ = "invalid number": RETURN
CASE "0" TO "9"
vsn_numberpresent& = -1
CASE "D", "E"
vsn_depresent& = vsn_depresent& + 1
IF decimalcnt& = 0 AND sm_i& <> 2 OR vsn_depresent& > 1 OR vsn_numberpresent& = 0 OR vsn_negcnt& > 1 OR vsn_poscnt& > 1 OR vsn_negcnt& = 1 AND vsn_poscnt& >= 1 THEN vsn_numberpresent& = 0: EXIT FOR
vsn_numberpresent& = 0
MID$(stringmathb$, sm_i&, 1) = "e" ' Standardize
CASE "."
decimalcnt& = decimalcnt& + 1
IF sm_i& <> 2 THEN vsn_numberpresent& = 0: EXIT FOR
CASE ELSE
vsn_numberpresent& = 0: EXIT FOR
END SELECT
NEXT
IF decimalcnt& = 0 THEN stringmathb$ = MID$(stringmathb$, 1, 1) + "." + MID$(stringmathb$, 2) ' Standardize "."
IF vsn_numberpresent& = 0 OR vsn_negcnt& = 1 AND vsn_poscnt& = 1 OR decimalcnt& > 1 OR INSTR(stringmathb$, ".") <> 2 THEN stringmathb$ = "invalid number": RETURN
vsn_depresent& = INSTR(stringmathb$, "e")
sm_x$ = MID$(stringmathb$, vsn_depresent& + 1, 1) ' Standardize exponent "+" these two lines.
IF sm_x$ <> "+" AND sm_x$ <> "-" THEN stringmathb$ = MID$(stringmathb$, 1, vsn_depresent&) + "+" + MID$(stringmathb$, vsn_depresent& + 1)
IF MID$(stringmathb$, vsn_depresent& + 2, 1) = "0" THEN
IF MID$(stringmathb$, vsn_depresent& + 3, 1) <> "" THEN stringmathb$ = "invalid number": RETURN ' No leading zeros allowed in exponent notation.
END IF
jjed& = INSTR(stringmathb$, "e") ' Get position of notation.
valexpside$ = MID$(stringmathb$, jjed&) ' These two lines break up into number and notation
stringmathb$ = MID$(stringmathb$, 1, jjed& - 1) ' stringmathb$ is +- single digit whole number, decimal point and decimal number. valexpside$ is notation, sign and exponent.
DO UNTIL RIGHT$(stringmathb$, 1) <> "0" ' Remove any trailing zeros for number. Example 1.0d3 or 1.0000d3, etc.
stringmathb$ = MID$(stringmathb$, 1, LEN(stringmathb$) - 1)
LOOP
IF VAL(MID$(stringmathb$, 1, INSTR(stringmathb$, ".") - 1)) = 0 THEN
IF RIGHT$(stringmathb$, 1) = "." THEN
stringmathb$ = "0.e+0" ' Handles all types of zero entries.
ELSE
stringmathb$ = "invalid number": RETURN
END IF
RETURN
END IF
stringmathb$ = sm_sign$ + stringmathb$ + valexpside$
RETURN
ELSE
FOR sm_i& = 1 TO LEN(stringmathb$)
validatenum$ = MID$(stringmathb$, sm_i&, 1)
SELECT CASE validatenum$
CASE "."
decimalcnt& = decimalcnt& + 1
CASE "0"
vsn_zerospresent& = -1
CASE "1" TO "9"
vsn_numberpresent& = -1
CASE "$"
CASE ELSE
stringmathb$ = "invalid number": RETURN
END SELECT
NEXT
IF decimalcnt& > 1 OR vsn_negcnt& > 1 OR vsn_poscnt& > 1 OR vsn_negcnt& >= 1 AND vsn_poscnt& >= 1 THEN
stringmathb$ = "invalid number": RETURN
END IF
IF INSTR(stringmathb$, "$") THEN GOSUB currency_validate
IF INSTR(stringmathb$, ",") THEN
GOSUB comma_validation
IF stringmathb$ = "invalid number" THEN RETURN
GOSUB comma_removal
END IF
IF RIGHT$(stringmathb$, 1) = "." THEN stringmathb$ = MID$(stringmathb$, 1, LEN(stringmathb$) - 1)
DO UNTIL LEFT$(stringmathb$, 1) <> "0" ' Strip off any leading zeros.
stringmathb$ = MID$(stringmathb$, 2)
LOOP
stringmathb$ = sm_sign$ + stringmathb$
IF INSTR(stringmathb$, ".") THEN
DO UNTIL RIGHT$(stringmathb$, 1) <> "0" ' Strip off any trailing zeros in a decimal.
stringmathb$ = MID$(stringmathb$, 1, LEN(stringmathb$) - 1)
LOOP
END IF
IF RIGHT$(stringmathb$, 1) = "." THEN stringmathb$ = MID$(stringmathb$, 1, LEN(stringmathb$) - 1)
IF vsn_numberpresent& = 0 THEN
IF vsn_zerospresent& THEN
stringmathb$ = "0"
ELSE
stringmathb$ = "invalid number"
END IF
END IF
END IF
RETURN
' Convert to commas, currency, S.N., etc.
sm_converter:
IF comma_display% THEN GOSUB comma_placement
IF currency_display% THEN GOSUB currency_convert
IF snconvert% THEN GOSUB numeric_to_scientific
RETURN
' Add in commas.
comma_placement:
GOSUB comma_prep
sm_i& = 0: sm_j& = 0: sm_seed& = 0
sm_seed& = LEN(temp_stringmathb1$) MOD 3: IF sm_seed& = 0 THEN sm_seed& = 3
sm_m1& = LEN(temp_stringmathb1$)
sm_m2& = (LEN(temp_stringmathb1$) - 1) \ 3
sm_replace$ = SPACE$(sm_m1& + sm_m2&)
DO WHILE sm_i& < sm_m1&
MID$(sm_replace$, sm_j& + 1, sm_seed& + 1) = MID$(temp_stringmathb1$, sm_i& + 1, sm_seed&) + ","
sm_i& = sm_i& + sm_seed&: sm_j& = sm_j& + sm_seed& + 1: sm_seed& = 3
LOOP
sm_replace$ = RTRIM$(sm_replace$)
IF RIGHT$(sm_replace$, 1) = "," THEN
stringmathb$ = MID$(sm_replace$, 1, LEN(sm_replace$) - 1)
ELSE
stringmathb$ = sm_replace$
END IF
sm_replace$ = "": temp_stringmathb1$ = ""
RETURN
' Validate comma entry.
comma_validation:
GOSUB comma_prep
IF INSTR(temp_stringmathb2$, ",") <> 0 OR temp_stringmathb1$ = STRING$(LEN(temp_stringmathb1$), ",") THEN
stringmathb$ = "invalid number" ' Decimal part has comma or entry is all commas.
ELSE
FOR sm_i& = LEN(temp_stringmathb1$) TO 1 STEP -1
sm_j% = sm_j% + 1
IF sm_j% = 4 THEN
IF MID$(temp_stringmathb1$, sm_i&, 1) <> "," THEN stringmathb$ = "invalid number": EXIT FOR
sm_j% = 0
END IF
NEXT
IF stringmathb$ <> "invalid number" THEN
stringmathb$ = sm_sign$ + temp_stringmathb1$ + temp_stringmathb2$
END IF
END IF
temp_stringmathb1$ = "": temp_stringmathb2$ = "": sm_i& = 0: sm_j% = 0: sm_sign$ = "": sm_dollar$ = ""
RETURN
comma_removal:
sm_i& = 0: sm_j& = 0: sm_seed& = 0
sm_replace$ = SPACE$(LEN(stringmathb$))
DO
sm_i& = INSTR(sm_seed& + 1, stringmathb$, ",")
IF sm_i& = 0 THEN EXIT DO
MID$(sm_replace$, sm_j& + 1, sm_i& - sm_seed& + 1) = MID$(stringmathb$, sm_seed& + 1, sm_i& - sm_seed& - 1)
sm_j& = sm_j& + sm_i& - sm_seed& - 1
sm_seed& = sm_i&
LOOP
stringmathb$ = RTRIM$(sm_replace$) + MID$(stringmathb$, sm_seed& + 1): sm_replace$ = ""
RETURN
comma_prep:
IF LEFT$(stringmathb$, 1) = "-" THEN stringmathb$ = MID$(stringmathb$, 2): sm_sign$ = "-"
temp_stringmathb1$ = stringmathb$: stringmathb$ = ""
IF INSTR(temp_stringmathb1$, ".") THEN
temp_stringmathb2$ = MID$(temp_stringmathb1$, INSTR(temp_stringmathb1$, ".")) ' Decimal part
temp_stringmathb1$ = MID$(temp_stringmathb1$, 1, INSTR(temp_stringmathb1$, ".") - 1) ' Non-decimal part
END IF
IF LEFT$(temp_stringmathb1$, 1) = "$" THEN temp_stringmathb1$ = MID$(temp_stringmathb1$, 2): sm_dollar$ = "$"
RETURN
currency_validate:
IF LEFT$(stringmathb$, 2) = "$-" OR LEFT$(stringmathb$, 2) = "$+" THEN stringmathb$ = "invalid number": RETURN
IF LEFT$(stringmathb$, 1) = "$" THEN stringmathb$ = MID$(stringmathb$, 2)
IF INSTR(stringmathb$, "$") THEN stringmathb$ = "invalid number": RETURN
sm_dollar$ = "$"
RETURN
currency_convert:
IF INSTR(UCASE$(stringmathb$), "D") <> 0 OR INSTR(UCASE$(stringmathb$), "E") <> 0 THEN GOSUB scientific_to_numeric
IF INSTR(stringmathb$, ",") = 0 THEN GOSUB comma_placement
IF INSTR(stringmathb$, ".") = 0 THEN stringmathb$ = stringmathb$ + ".00"
IF RIGHT$(stringmathb$, 1) = "." THEN stringmathb$ = stringmathb$ + "00"
IF MID$(stringmathb$, LEN(stringmathb$) - 2, 1) <> "." THEN stringmathb$ = stringmathb$ + "0"
IF MID$(stringmathb$, LEN(stringmathb$) - 2, 1) <> "." THEN stringmathb$ = "invalid number": RETURN
IF LEFT$(stringmathb$, 1) = "-" THEN stringmathb$ = MID$(stringmathb$, 2)
stringmathb$ = sm_sign$ + "$" + stringmathb$
RETURN
numeric_to_scientific:
IF LEFT$(stringmathb$, 1) = "-" THEN stringmathb$ = MID$(stringmathb$, 2): n2sign$ = "-"
IF INSTR(stringmathb$, ".") = 0 THEN exponentvalue&& = LEN(stringmathb$) - 1 ELSE exponentvalue&& = INSTR(stringmathb$, ".") - 2 ' Exponent is one less than number of digits for whole number an two less than the placement of the decimal point for a fraction.
stringmathb$ = MID$(stringmathb$, 1, INSTR(stringmathb$, ".") - 1) + MID$(stringmathb$, INSTR(stringmathb$, ".") + 1)
IF LEFT$(stringmathb$, 1) = "0" AND LEN(stringmathb$) > 1 OR exponentvalue&& = -1 THEN
DO UNTIL LEFT$(stringmathb$, 1) <> "0" ' Remove leading zeros to consider rounding.
stringmathb$ = MID$(stringmathb$, 2)
exponentvalue&& = exponentvalue&& - 1
LOOP
esign$ = "-"
ELSE
esign$ = "+"
END IF
DO UNTIL RIGHT$(stringmathb$, 1) <> "0" ' Remove trailing zeros.
stringmathb$ = MID$(stringmathb$, 1, LEN(stringmathb$) - 1)
LOOP
IF stringmathb$ = "" THEN stringmathb$ = "0": esign$ = "+": exponentvalue&& = 0
stringmathb$ = LEFT$(stringmathb$, 1) + "." + MID$(stringmathb$, 2)
IF stringmathb$ = "0." THEN n2sign$ = "": esign$ = "+"
stringmathb$ = stringmathb$ + "e" + esign$ + LTRIM$(STR$(ABS(exponentvalue&&))) ' S.N formed here.
IF stringmathb$ <> "overflow" THEN
stringmathb$ = n2sign$ + stringmathb$
END IF
n2sign$ = "": esign$ = "": exponentvalue&& = 0
RETURN
scientific_to_numeric:
IF INSTR(UCASE$(stringmathb$), "D") THEN MID$(stringmathb$, INSTR(UCASE$(stringmathb$), "D"), 1) = "e"
IF MID$(stringmathb$, INSTR(stringmathb$, "e") + 2) = "0" THEN ' The numeric value is the number without the zero exponent.
stringmathb$ = MID$(stringmathb$, 1, INSTR(stringmathb$, "e") - 1)
IF RIGHT$(stringmathb$, 1) = "." THEN stringmathb$ = MID$(stringmathb$, 1, LEN(stringmathb$) - 1)
RETURN
ELSE
IF LEFT$(stringmathb$, 1) = "-" THEN stn_sign$ = "-": stringmathb$ = MID$(stringmathb$, 2)
stringmathb$ = MID$(stringmathb$, 1, INSTR(stringmathb$, ".") - 1) + MID$(stringmathb$, INSTR(stringmathb$, ".") + 1) ' Remove decimal point.
stn_i& = INSTR(stringmathb$, "e") - 1 ' Length of the numric part.
IF MID$(stringmathb$, INSTR(stringmathb$, "e") + 1, 1) = "-" THEN
stringmathb$ = "." + STRING$(VAL(MID$(stringmathb$, stn_i& + 3)) - 1, "0") + MID$(stringmathb$, 1, stn_i&) ' Decimal point followed by exponent value in zeros added in front of numeric part.
ELSE
IF stn_i& - 1 > VAL(MID$(stringmathb$, stn_i& + 3)) THEN stn_point$ = "." ' - 1 for decimal place. Ex 2.034d+2 is 2034 here where 3 places to the right . could be moved before . disappears. > so no trailing decimal results.
stringmathb$ = MID$(MID$(stringmathb$, 1, stn_i&), 1, VAL(MID$(stringmathb$, stn_i& + 3)) + 1) + stn_point$ + MID$(MID$(stringmathb$, 1, stn_i&), VAL(MID$(stringmathb$, stn_i& + 3)) + 2, stn_i& - VAL(MID$(stringmathb$, stn_i& + 3)) - 1) + STRING$(VAL(MID$(stringmathb$, stn_i& + 2)) - (stn_i& - 1), "0")
END IF
END IF
IF stringmathb$ = "0" THEN stn_sign$ = ""
stringmathb$ = stn_sign$ + stringmathb$
stn_sign$ = "": stn_point$ = ""
RETURN
limit_round_convert:
' Try SN if whole number is too large (as it may be trailing zeros) or decimal is beyond limit.
IF LEFT$(stringmathb$, 2) = ".0" AND LEN(stringmathb$) > limit&& + 1 OR INSTR(stringmathb$, ".") > limit&& + 1 OR INSTR(stringmathb$, ".") = 0 AND LEN(stringmathb$) > limit&& THEN
IF limit&& > 1 THEN
GOSUB numeric_to_scientific ' Retry as S.N.
IF LEN(stringmathb$) > limit&& + 3 THEN ' Needs rounding.
snotation$ = MID$(stringmathb$, INSTR(UCASE$(stringmathb$), "E"))
exponentvalue&& = VAL(MID$(snotation$, 2)) ' Get positive or negative sign.
snexponent$ = MID$(stringmathb$, INSTR(UCASE$(stringmathb$), "E") + 2)
stringmathb$ = MID$(stringmathb$, 1, INSTR(UCASE$(stringmathb$), "E") - 1)
'''IF LEN(stringmathb$) + LEN(snexponent$) > limit&& + 1 AND exponentvalue&& >= limit&& THEN BEEP
IF exponentvalue&& >= limit&& THEN
stringmathb$ = MID$(stringmathb$, 1, exponentvalue&& + 3)
ELSE
stringmathb$ = MID$(stringmathb$, 1, limit&& - LEN(snexponent$) + 2)
END IF
GOSUB string_rounding_method
IF LEFT$(stringmathb$, 3) = "10." THEN
stringmathb$ = "1." + MID$(stringmathb$, 4)
' Add one to the exponent.
FOR round_i& = LEN(snexponent$) TO 1 STEP -1
round_x$ = CHR$(ASC(MID$(snexponent$, round_i&, 1)) + 1)
IF round_x$ <> CHR$(47) THEN ' Decimal point + 1. Ignore.
IF round_x$ = CHR$(58) THEN
MID$(snexponent$, round_i&, 1) = "0": carry$ = "1"
ELSE
MID$(snexponent$, round_i&, 1) = round_x$: carry$ = "": EXIT FOR
END IF
END IF
NEXT
snexponent$ = carry$ + snexponent$: carry$ = ""
END IF
stringmathb$ = stringmathb$ + MID$(snotation$, 1, 2) + snexponent$
IF LEN(snexponent$) + LEN(MID$(stringmathb$, 1, INSTR(UCASE$(stringmathb$), "E") - 1)) > limit&& + 1 THEN
stringmathb$ = "overflow"
END IF
exponentvalue&& = 0
END IF
ELSE
IF INSTR(stringmathb$, ".") > 0 AND INSTR(stringmathb$, ".") <= limit&& THEN
stringmathb$ = MID$(stringmathb$, 1, limit&& + 2)
IF round_total% = -1 AND RIGHT$(stringmathb$, 1) > "4" THEN
GOSUB string_rounding_method
ELSE
stringmathb$ = MID$(stringmathb$, 1, limit&& + 1)
IF show_rounding% THEN stringmathround$ = "r"
END IF
ELSE
stringmathb$ = "overflow"
END IF
END IF
RETURN
END IF
IF LEN(stringmathb$) > limit&& AND INSTR(stringmathb$, ".") = 0 OR LEN(stringmathb$) > limit&& + 1 AND INSTR(stringmathb$, ".") <> 0 THEN
IF INSTR(stringmathb$, ".") = 0 THEN
stringmathb$ = MID$(stringmathb$, 1, limit&& + 1)
ELSE
stringmathb$ = MID$(stringmathb$, 1, limit&& + 2)
END IF
GOSUB string_rounding_method
IF LEN(stringmathb$) > limit&& + lrc_decimalpoint& THEN ' Ex: limit&& = 4 9999.9 1.e+4
GOSUB numeric_to_scientific
ELSE
IF LEN(stringmathb$) > limit&& + lrc_decimalpoint& THEN stringmathb$ = "overflow"
END IF
END IF
RETURN
replace_decimal:
IF addsubplace& THEN
addsubx1$ = STRING$(addsubplace& - LEN(addsubx1$), "0") + addsubx1$
addsubx1$ = MID$(addsubx1$, 1, LEN(addsubx1$) - addsubplace&) + "." + MID$(addsubx1$, LEN(addsubx1$) - addsubplace& + 1)
DO UNTIL RIGHT$(addsubx1$, 1) <> "0" ' Remove trailing zeros in a decimal sum.
addsubx1$ = MID$(addsubx1$, 1, LEN(addsubx1$) - 1)
addsubplace& = addsubplace& - 1
LOOP
IF RIGHT$(addsubx1$, 1) = "." THEN addsubx1$ = MID$(addsubx1$, 1, LEN(addsubx1$) - 1) ' Number is now an integer.
END IF
RETURN
string_rounding_method:
IF INSTR(stringmathb$, ".") THEN lrc_decimalpoint& = 1 ELSE lrc_decimalpoint& = 0
IF MID$(stringmathb$, LEN(stringmathb$), 1) > "4" THEN
FOR round_i& = LEN(stringmathb$) - 1 TO 1 STEP -1
round_x$ = CHR$(ASC(MID$(stringmathb$, round_i&, 1)) + 1)
IF round_x$ <> CHR$(47) THEN ' Decimal point + 1. Ignore.
IF round_x$ = CHR$(58) THEN
MID$(stringmathb$, round_i&, 1) = "0": carry$ = "1"
ELSE
MID$(stringmathb$, round_i&, 1) = round_x$: carry$ = "": EXIT FOR
END IF
END IF
NEXT
stringmathb$ = carry$ + MID$(stringmathb$, 1, LEN(stringmathb$) - 1): carry$ = ""
IF show_rounding% THEN stringmathround$ = "R"
ELSE
stringmathb$ = MID$(stringmathb$, 1, LEN(stringmathb$) - 1)
IF show_rounding% THEN stringmathround$ = "r"
END IF
IF lrc_decimalpoint& THEN
DO UNTIL RIGHT$(stringmathb$, 1) <> "0"
stringmathb$ = MID$(stringmathb$, 1, LEN(stringmathb$) - 1)
LOOP
IF stringmathb$ = "" OR stringmathb$ = "." THEN stringmathb$ = "0": lrc_decimalpoint& = 0
IF RIGHT$(stringmathb$, 1) = "." AND exponentvalue&& = 0 THEN
stringmathb$ = MID$(stringmathb$, 1, LEN(stringmathb$) - 1): lrc_decimalpoint& = 0
END IF
END IF
RETURN
END SUBI set the default limit&& (number of digits to display) to 1700.
You can unremark the scientific notation variable, if you want results in SN.
Have a great weekend!
Pete