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#1
September 3rd, 2002, 03:20 PM
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String to integer
I'm coding a windows application, and I need to read a string and convert it to an integer.
Currently, I'm currently using _ttoi, which works as expected for a raw decimal integer. Now, what if I want to be able to use hex codes and such? Is there a function that can take a string like '0x32' and return the number 50? Coding it by hand would be easy, I just figure there's got to be some kind of pre-written one out there.
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#2
September 10th, 2002, 05:12 PM
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Hehe, I was about to code a similar function just now for my own project, when suddenly I remembered a function from a long time ago.
 It's called sscanf(). It works the same as scanf() except that it uses a string for its first argument and a format string for the second argument (sort of like sprintf()). If you want, here's some code I tried out:Code:
#include <stdio.h>
int main() {
char *foo = "F00";
int x;
sscanf(foo, "%X", &x);
printf("Hex %s is dec %d", foo, x);
return 0;
}
Hope this helps!
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#3
September 10th, 2002, 05:56 PM
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Beautiful. Using a %i formatting string does exactly what I wanted it to do: the user can enter either decimal or hexidecimal and the function will sort it out accordingly.
Thanks!
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