Input and Output in C++

C++ 141 views Dec 22, 2025 2 min read

Input and output operations allow interaction between the user and the program.

1. Input in C++

C++ uses the cin object to take input from the user.

cin >> variable;

int age;
cin >> age;

C++ uses the cout object to display output on the screen.

cout << variable>

cout << age>

To use cin and cout, include:

#include 
using namespace std;

cout << "Age: " << age>

int a, b;
cin >> a >> b;

Using endl:

cout << "Hello" << endl>

Using \n:

cout << "Hello\n";

#include 
using namespace std;

int main() {
    int x, y;
    cin >> x >> y;
    cout << "Sum = " << x>return 0;
}

string name;
cin >> name;
cout << name>

Note: cin reads input only until a space.

Input and output operations are essential for making C++ programs interactive and user-friendly.

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