#include<stdio.h>

int main()
{

    int a,b,c;

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

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

    return 0;
}
     
           
Note: Need to be arranged in compiler after copied
   

 OutPut:

Enter Three integer Numbers: 3 5 9 Greatest Integer = 9