Re: Basic c question ==> atol

Hi Lim,

Because 2147483647 is the highest number that can be stored into a 'long'
variable in C. A 'long' is a 32-bit integer (10i 0 in RPG) and therefore
can support values from -2147483648 to 2147483647

Since 6027461692 is too high to fit in a 'long', it gives you the highest
that WILL fit.




On 1/29/2010 3:58 PM, Lim Hock-Chai wrote:

does anyone know why the result of this atol is 2147483647?

#include<string.h>
#include<stdio.h>
#include<stdlib.h>

int main(void) {

long num;
char *sBuf;

sBuf = "6027461692 ";
num = atol(sBuf); //=> why would this result in 2147483647?
exit(0);
}