#include  <stdio.h>
#define Sentinel 0
int largest(int max, int a);
int smallest(int min,int b);
int main(void)
{
 int maximum,minimum,num; 
 printf("\nInput the number(Enter %d for exit): ", Sentinel);  scanf("%d", &num);
 maximum = num;
 minimum = num;
 while (num != Sentinel) {
  maximum = largest(maximum,num);
  minimum = smallest(minimum,num);
  printf("Input the number(Enter %d for exit): ",Sentinel);  scanf("%d", &num);
 }
 printf("\nLargest number: %d\n", maximum);
 printf("Smallest number: %d\n\n", minimum); 
 return (0);
}
 
int largest(int max, int a)
{
 if ( max < a) {
  return (a);
 }
 else  {
  return (max);
 }
}
int smallest(int min,int b)
{
 if ( min > b)  {
  return (b);
 }
 else {
  return (min);
 }
}