C program that finds the smallest number by using id statement.

#include<stdio.h>

void main ()

{

      int a,b,c,d;

      int smallest_num=0;

      printf("Enter first number  :");

      scanf("%d",&a);

      printf("Enter second number :");

      scanf("%d",&b);

      printf("Enter third number :");

      scanf("%d",&c);

      printf("Enter fourth number :");

      scanf("%d",&d);

      if(a<b &&a<c  && a<d)

      {

            smallest_num=a;

            printf("Smallest number  is %d ",a);

      }

      if(b<a &&b<c && b<d)

      {

            smallest_num=b;

            printf("Smallest number  is %d ",b);

      }

      if(c<a && c<b && c<d )

      {

            smallest_num=c;

            printf("Smallest number  is %d ",c);

      }

      if(d<a && d<b && d<c)

      {

            smallest_num=d;

            printf("Smallest number  is %d ",d);

      }

}

OUT PUT :