Converting a number to a string

Junior WebHelper Joined: 08 Feb 2002 Posts: 37

Hi,

Does anyone knows, in C, what function must we use to convert a number to a string?

Regards,

Kepler

Posted: Thu Oct 07, 2004 3:46 pm (19 years, 6 months ago)

I don't think there is one in the standard library, but this example from the C book will do it:

Code:

#include <string.h>

void reverse(char s[])
{
int c,i,j;

for(i=0, j = strlen(s)-1; i < j; i++, j--) {
c = s[i];
s[i] = s[j];
s[j] = c;
}
}

void itoa(int n, char s[])
{
int i, sign;

if ((sign = n) < 0) /* record sign */
n = -n; /* make n positive */
i = 0;
do { /* generate digits in reverse order */
s[i++] = n % 10 + '0'; /* get next digit */
} while ((n /= 10) > 0);
if (sign < 0)
s[i++] = '-';
s[i] = '\0';
reverse(s);
}

Just call atoi with the number and the char array you want it stored in. If it doesn't compile, it's probably because I typed it wrong Wink