// This program demonstrates why we use pointers to help us 
// get around the whole only able to return one thing issue
// with functions! 

// Week 5, Lecture 10

#include <stdio.h>

void swap(int *number_one, int *number_two);

int main(void) {
    int number_one = 5;
    int number_two = 10;

    printf("Before swap:\n");
    printf("Number 1 = %d\nNumber 2 = %d\n", number_one, number_two);

    // Call the function and pass the addresses of 
    // the two numbers
    swap(&number_one, &number_two);

    printf("After swap:\n");
    printf("Number 1 = %d\nNumber 2 = %d\n", number_one, number_two);
    
    return 0;
}

// Function that swaps two numbers
// Input: two pointers 
// Output: void
void swap(int *number_one, int *number_two) {
    int temp = *number_one;
    *number_one = *number_two;
    *number_two = temp;
}