Answer :- The following C++ code swap the 2 numbers inside a function swap2Nums with the help of the third variable.The neccessary instructions are mentioned through comments in the code.
The code is :-
#include <iostream>
using namespace std;
// function definition function named as swap2Nums and taking the refrence parameters
void swap2Nums(int &a, int &b) {
// initialising the third variable temp_var
int temp_var;
temp_var = a;
a = b;
b = temp_var;
}
int main()
{
int num1,num2;
//Take input of variables from user
cin>>num1;
cin>>num2;
cout << "Before swapping the numbers are :-" << endl;
cout << "num1 = " << num1 << endl;
cout << "num2 = " << num2 << endl;
// call the function to swap the both numbers
swap2Nums(num1,num2);
// printing the value of both numbers after the swap
cout << "After swapping the numbers are :-" << endl;
cout << "num1 = " << num1 << endl;
cout << "num2 = " << num2 << endl;
return 0;
}
The output is :
The code screenshot is :-
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