basic_istream::operator>> in C++

The basic_istream::operator>> is known as the extraction operator. This operator is used to apply on the input string. 
Header File: 

<iostream>

Syntax: 

basic_istream& operator>>( int& a );
basic_istream& operator>>( unsigned int& a );

Parameters: 

• a : This represents the value where the extracted character are stored.

Return Value: The istream::operator>> returns the basic_istream object.
Below is the program to illustrate std::basic_istream::operator>>:
Program 1:

CPP14

// C++ code for basic_istream::operator>>
#include <bits/stdc++.h>
using namespace std;

// Driver code
int main()
{
    // Declare the string "12 12.2 GeeksforGeeks"
    string gfg = "12 12.2 GeeksforGeeks";

    istringstream stream(gfg);
    int a;
    float b;
    bool c;

    stream >> a >> b >> boolalpha >> c;
    cout << "a = " << a << '\n'
         << "b = " << b << '\n'
         << "c = " << boolalpha << c << endl;

    return 0;
}

Output:

a = 12
b = 12.2
c = false

Program 2:

CPP14

// C++ code for basic_istream::operator>>
#include <bits/stdc++.h>
using namespace std;

// Driver code
int main()
{
    // Declare the string "144 0.26 GFG"
    string gfg = "144 0.26 GFG";

    istringstream stream(gfg);
    int a;
    float b;
    bool c;

    stream >> a >> b >> boolalpha >> c;
    cout << "a = " << a << '\n'
         << "b = " << b << '\n'
         << "c = " << boolalpha << c << endl;

    return 0;
}

Output:

a = 144
b = 0.26
c = false

Reference: http://www.cplusplus.com/reference/istream/basic_istream/operator%3E%3E/