#include<stdio.h>

int main()
{
    int a,b,c;
    printf("Enter Three Numbers:\n");
    scanf("%d%d%d",&a,&b,&c);

    if(a>b && a>c)
    {
          printf("Greatest Integer = %d",a);
    }

    if(b>a && b>c)
    {
          printf("Greatest Integer = %d",b);
    }
    
    if(c>a && c>b)
    {
          printf("Greatest Integer = %d",c);
    }
     
    return 0;
}
     
           
Note: Need to be arranged in compiler after copied
   

 OutPut:

Enter Three Numbers: 3 6 9 Greatest Integer = 9