convert char* to double and back

[Andy H]

I have a char* that holds a numeric value of for example: 172,500 and I want to multiply this by another number and write the contents back to a new char*. Could someone give some example code on how to easily achieve this?

[sw thi]

You can use atoi and itoa functions to achieve this. atoi - converts string to int. itoa - converts int to string.

[Nishad S]

Andy H wrote:

for example: 172,500

Actually is there a comma (,) ?

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[Andy H]

There is a (,) in the string. What I think I will do is write a class that can cater for all eventualities, as there is also a possibility of the number being in scientific notation, just to make matters worse!

[Nishad S]

You can do it simple... first filter out the comma. If you are using the CString, use str.Remove(',') so that the comma will be filtered. Then you can convert it to integer using atol, atoi, etc., or _ttol, _ttoi, etc.

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