K and R C, Solution to Exercise 3-5:
K and R C Programs Exercises provides the solution to all the exercises in the C Programming Language (2nd Edition). You can learn and solve K&R C Programs Exercise.
Write a c program to convert the integer n into a base b character representation in the string s. In particular, itob(n, s, 16) formats n as a hexadecimal integer in s. Read more about C Programming Language .

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

void itob(int n, char s[], int b);
void reverse(char s[]);

int main(void) {
 char buffer[10];
 int i;

 for ( i = 2; i <= 20; ++i ) {
  itob(255, buffer, i);
  printf("Decimal 255 in base %-2d : %sn", i, buffer);
 }
 return 0;
}


/*  itob: convert n to charecters in s - base b */

void itob(int n, char s[], int b) {

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


 if ((sign = n) < 0)
  n = -n;
 i = 0;
 do {
  j = n%b;
  s[i++] = (j <= 9) ? j+'0' : j+'a'-10;
 } while ((n /= b) > 0);
 if (sign < 0)
  s[i++] = '-';
 s[i] = '