Example: Greatest of Three Numbers in C using Pointers

// Greatest of Three Numbers in C using Pointers
#include <stdio.h>

// It's the main function of the program
int main()
{
    int num1, num2, num3;
    int *p_num1, *p_num2, *p_num3;

    // Step-1 Enter three integer values
    printf("INPUT-1: ");
    scanf("%d", &num1);

    printf("INPUT-2: ");
    scanf("%d", &num2);

    printf("INPUT-3: ");
    scanf("%d", &num3);

    // Step-2 Reference the values to pointer variables
    p_num1 = &num1;
    p_num2 = &num2;
    p_num3 = &num3;

    // Step-2 Check if p_num1 is greater than both p_num2 and p_num3, p_num1 is the greatest
    if (*p_num1 >= *p_num2 && *p_num1 >= *p_num3)
    {
        printf("\nGreatest Number :: %d", *p_num1);
    }

    // Step-3 Check if p_num2 is greater than both p_num1 and p_num3, p_num2 is the greatest
    else if (*p_num2 >= *p_num1 && *p_num2 >= *p_num3)
    {
        printf("\nGreatest Number :: %d", *p_num2);
    }

    // Step-4 If above both conditions are false then, p_num3 is the greatest
    else
    {
        printf("\nGreatest Number :: %d", *p_num3);
    }

    return 0;
}