Input Two Numbers And Swap Their Values in C++

Source Code

#include <iostream>

using namespace std;

int main(int argc, char** argv) {
    
    // Variable Declaration for input
    int a,b;
    // Temporary variable
    int temp;
    
    cout<<"Enter First Number: ";
    cin>>a;
    cout<<"Enter Second Number: ";
    cin>>b;
    
    // Swapping values
    temp = a;
    a = b;
    b = temp;
    
    // Values after swapping
    cout<<" First Number: "<<a;
    cout<<"\n Second Number: "<<b;
    
    return 0;
}

Output

Working

In this program first we declare three variables of type int. Then take input in variables a and b. We will not take input in temp variable. temp variable will used to temporarily store values of  variable a for interchange. After getting input we follow the following procedure.

• Assign value of variable a to temp variable
• Assign value of variable b to variable a (At this step variable a will contain value of variable b)
• Assign value of temp to b (At this step value of a will assign to variable b, because temp containing the value of  variable a)

After this swapping process program will print value of variable a and variable b.