itob

#include <stdio.h>
#include <string.h>
#define abs(x) ( (x) > 0 ? (x): -(x))
int itob(int n, char s[], int b);
void reverse(char s[]);

int main(void) {
        int number;
    char str[1000];

    
    number = -2147483648;

    
    printf("Integer %d printed as\n String:",number);

    itob(number,str, 10);
    printf("%s",str);

    return 0;
}
int itob(int n, char s[], int b){\
    int i, sign;
    sign = n;
    i = 0;
    do{
        
            s[i++] = abs(n % b) + ( (n % b >= 0 && n % b <=9) ? '0' : 'a' - 10);
            
    } while((n /= b) != 0);
    if( sign < 0)
        s[i++] = '-';
    s[i]='\0';
    reverse(s);
}
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;
}