What is basic input output operations in C++?

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Hope you tried Hello world program, and at least got a idea how C++ programs looks like.

Now its time to learn basic input output operations in C++.

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To learn Basic Input Output operation in C++ first you need to clear your concept of C++ most useful object i.e. "cin" and "cout".

1) cin object is use to take input from keyboard, its always associated with its operator sign >> , after this sign you need to specify variable name.

Example: cin>>VariableName; 

2) cout object is use to display content of variable or custom message to screen, its serves as output operation. It is also associated with operator sign << , after this message or variable is used to specify.

Example: cout<<"Hi";

Now here is program with C++ basic input / out operation.

In below program, we will show message and save number in integer variable "no1".

#include<stdio.h>

#include<iostream.h>

void main()

{

    int no1;

    cout<<"Enter number: ";  // Show message

    cin>>no1;  //Save Integer value in variable no1

    

    //Showing number which was entered by user

    cout<<"You have entered "<<no1;

    getch();

}

Now notice while showing variable value using cout,  we have used operator  << twice, this is because first operator << will show our custom message and second << will show value of  no1.

Run this program using run option of your IDE and enjoy. If you have any doubt comment me.

Enjoy Coding :)