#include <strings.h>

/* this `type less' definition of max is doubtless dangerous,
   but it *seems* to work */
   

extern void *malloc();

max(a, b)
{
  if  (a > b) return(a);
  else return(b);
}

void reverse(s)
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(n,s)
char s[];
int n;
{
  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);    /* delete it */
  if (sign < 0)
  s[i++] = '-';
  s[i] = '\0';
  reverse(s);
}

/*
#include <stdio.h>

main()
{
 char s[5];

 strcpy(s,"dog");
 
 printf("%s\n",s);

 reverse(s);

 itoa(4,s);

 printf("%s\n",s);
}
*/