how to input in cpp

To input data in C++, you can use the std::cin object along with the >> extraction operator. Here are the steps to input data in C++:

1. Include the necessary header file:

#include <iostream>

This header file provides the necessary classes and functions for input/output operations in C++.

1. Declare variables to store the input:

int number;
std::string name;

In this example, we are declaring an integer variable number and a string variable name to store the input.

1. Use std::cin to read the input:

std::cout << "Enter a number: ";
std::cin >> number;

std::cout << "Enter your name: ";
std::cin >> name;

The std::cin object is used with the >> operator to read the input. In this example, we prompt the user to enter a number and their name, and then store the input in the respective variables.

1. Process the input:

std::cout << "You entered: " << number << std::endl;
std::cout << "Your name is: " << name << std::endl;

After reading the input, you can process it as needed. In this example, we simply print the entered number and name using std::cout.

Here's a complete example:

#include <iostream>

int main() {
    int number;
    std::string name;

    std::cout << "Enter a number: ";
    std::cin >> number;

    std::cout << "Enter your name: ";
    std::cin >> name;

    std::cout << "You entered: " << number << std::endl;
    std::cout << "Your name is: " << name << std::endl;

    return 0;
}

This example demonstrates how to input data in C++ using std::cin. The std::cin object reads the input from the user, and the >> operator is used to extract the input into variables.