itoa.c

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#include "simpletools.h"                      // simpletools function prototypes
 
char* itoa(int i, char b[], int base){
  char const digit[] = "0123456789ABCDEF";
  char* p = b;
  if(i<0){
    *p++ = '-';
    i = -1;
  }
  int shifter = i;
  do{ //Move to where representation ends
    ++p;
    shifter = shifter/base;
  }while(shifter);
  *p = '\0';
  do{ //Move back, inserting digits as u go
    *--p = digit[i%base];
    i = i/base;
  }while(i);
  return b;
}