Re: hex to int

Bill Cunningham wrote:
I have written this small program and I must admit I'm a little
stuck. Input should be a hex number like fff or 0xfff and convert it
to the decimal equivalent. The output I get is always 0.

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

int main(int argc, char **argv)
{
if (argc != 2) {
puts("hex usage error");
exit(EXIT_FAILURE);
}
int x = strtol(argv[1], NULL, 10);

that 3rd argument should be 16

printf("%i\n", x);
return 0;
}

Am I missing a std function here that could do this for me? I know
error checking is not present.

http://linux.die.net/man/3/strtol
If there were no digits at all, strtol() stores the original value of nptr in *endptr (and returns 0).
Bill

.

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