#include <stdio.h>
int main()
{
int num1, num2, num3, num4;
int greatest;
printf("Enter four numbers: ");
scanf("%d %d %d %d", &num1, &num2, &num3, &num4);
if(num1 > num2 && num1 > num3 && num1 > num4)
greatest = num1;
else if(num2 > num3 && num2 > num4)
greatest = num2;
else if(num3 > num4)
greatest = num3;
else
greatest = num4;
printf("Greatest of four numbers is %d", greatest);
return 0;
}