CODEWITHSUNDEEP
vbscript
Tommy Skaggs
Tommy Skaggs

Reputation: 239

CInt overflow error when value exceeds 100,000+

I am brand new to programming and I am running into some trouble with CInt overflow error.

Whenever the value reaches 100,000+ I get a CInt overflow error. This was a practice exercise in my intro to programming class. As far as I can see I coded it exactly how it was done in practice, but the practice shows using values as high as 300,000.

Can someone possibly explain what I might be doing wrong?

<script language="VBscript">
Option Explicit
DIM numberofshifts, totalshift1, totalshift2, _
  totalshift3, grandtotal, shiftaverage
numberofshifts=3
totalshift1 = Inputbox("How many widgets during the first shift")
totalshift2 = Inputbox("How many widgets during the second shift")
totalshift3 = Inputbox("How many widgets during the third shift")
grandtotal = cint(totalshift1) + totalshift2 + totalshift3
shiftaverage = grandtotal / numberofshifts
Document.write "The Total of the Three Shifts is " & grandtotal
Document.write "<br>The Average of the Three Shifts is " & shiftaverage
</script>

Upvotes: 23

Views: 52762

Answers (2)

Romeo
Romeo

Reputation: 1093

CInt can handle betweeen -32,768 and 32,767.

Use CLng instead of CInt.

MSDN Reference

Upvotes: 48

Russell S
Russell S

Reputation: 115

Converting string data to integers may be accomplished by using CInt() CLng() or CDbl(). It is important to remember the size limitations of these data types. Different programming languages have different limitations.
Here is a link to VBScript Data Types.

Integers can handle integers from -32,768 to 32,767. Long can handle integers from -2,147,483,648 to 2,147,483,647. Doubles can handle numbers up to 1.79769313486232E+308, (That's a bigger number than the number of atoms in the Sun, which is 1.19 octodecillion.) They are also double floating-point precision; meaning a double can also handle extremely precise decimal points.

grandtotal = cdbl(totalshift1) + totalshift2 + totalshift3

This will eliminate the overflow problem. It won't handle the error if a user enters a non-number, but that's another topic.

Upvotes: 3

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