Question

• Write a C++ program that asks the user to input two integer values, then calls a void function "swap" to swap the values for the first and second variable.

• As we mentioned before, in order to swap the valors of two variables, one can use the following:

temp= variable1;

variable1 = variable2;

variable2 = temp;

• Display the two variables before you call swap and after you call that function.

Comment in code would be greatly appreciated to follow along.

Answer 1

#include<iostream>
using namespace std;

//Function swap to swap the variables. Call by reference is used so that swapping occurs in the original variables and not just //the local variables.

void swap(int &var1, int &var2)
{
   int temp;
   temp = var1;
   var1 = var2;
   var2 = temp;
}
int main()
{
   int variable1, variable2;
   cout<<"Enter 2 integers to be swapped"<<endl;
   cin>>variable1>>variable2;

//Values before swapping
   cout<<"Values before swapping:"<<endl<<"variable1: "<<variable1<<endl<<"variable2: "<<variable2<<endl;
   swap(variable1, variable2); //Function call

//Values after swapping
cout<<"Values after swapping:"<<endl<<"variable1: "<<variable1<<endl<<"variable2: "<<variable2<<endl;
  
}

Output:

hope you like it

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