Chapter 3.1, Problem 3.1CP

Explanation of Solution

Header file for “cin”:

In C++ programming language, the “output stream” and “input stream” are primarily defined in “iostream” header file; it is the part of the C++ standard library.

• The header file “iostream” basically used to access the input and output built in functions of the C++ programming language.
• The “cout” and the “cin” are the objects of the “iostream” header.

Example:

Consider the following example:

// Include the header file

#include <iostream>

using namespace std;

// Driver function main()

int main()

{

    // Declare an integer variable for input

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