A simple program to ask the user to give two numbers and then the program will display the original arrangement and swap arrangement of the two numbers using functions in the C++ programming language.

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// swap.cpp
// Mr. Jake R. Pomperada, MAED-IT, MIT
// www.jakerpomperada.com
// jakerpomperada@gmail.com
// Bacolod City, Negros Occidental Philippines

#include <iostream>
#include <stdlib.h>

using namespace std;

void GetVal(int& Get1,int& Get2);
void SwapVal(int& Swap1,int& Swap2);
void ShowVal(int& Show1,int& Show2);

int main()
    int FirstNum,SecondNum;
    return 0;

void GetVal(int& Get1,int& Get2)
     cout << "\n\n";
	 cout << "\tSwap Two Numbers Using Functions in C++";
     cout << "\n\n";
	 cout << "\tGive Two Values: ";
     cin >> Get1 >> Get2;
     cout << "\n\n";
     cout << "\tOriginal Arrangement\n\n";
     cout <<"\t" << Get1 << "  " << Get2 << "\n";
     cout << "\n\n";
     cout << "\tSwap Arrangement\n\n";
     cout << "\n\n";

void SwapVal(int& Swap1,int& Swap2)
     int temp;
     temp = Swap1;
     Swap1 = Swap2;
     Swap2 = temp;

void ShowVal(int& Show1,int& Show2)
     cout <<"\t" << Show1 << "  " << Show2 << "\n";
     cout << "\n\n";
     cout << "\tEnd of Program";
     cout << "\n\n";