C++ LANGUAGE THE STANDARD INPUT STREAM (CIN)

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C++ LANGUAGE THE STANDARD INPUT STREAM (CIN)

 
The Standard Input Stream (cin) 


The predefined object cin is an instance of istream class. 
The cin object is said to be attached to the standard input 
device, which usually is the keyboard. The cin is used in 
conjunction with the stream extraction operator, which is 
written as >> which are two greater than signs as 
shown in the following example. 

#include <iostream> 
  
using namespace std; 
  
int main( ) 
{ 
   char name[50]; 
  
   cout << "Please enter your name: "; 
   cin >> name; 
   cout << "Your name is: " << name << endl; 
  
} 

When the above code is compiled and executed, it will prompt 
you to enter a name. You enter a value and then hit enter to 
see the following result: 

Please enter your name: cplusplus 

Your name is: cplusplus 

The C++ compiler also determines the data type of the entered 
value and selects the appropriate stream extraction operator 
to extract the value and store it in the given variables. 

The stream extraction operator >> may be used more than 
once in a single statement. To request more than one datum you 
can use the following: 

cin >> name >> age; 

This will be equivalent to the following two statements: 

cin >> name; 

cin >> age;