std::basic_istream::gcount() in C++ with Examples

The std::basic_istream::gcount() is used to count the characters in the given string. It returns the number of characters extracted by the last unformatted input operation. The unformatted input operation is returned by these function: get(), getline(), ignore(), peek(), read(), etc.

Header File:

<iostream>

Syntax:

streamsize gcount() const

Parameter: This method doesn’t accepts any parameter.

Return Value: It returns the number of characters extracted by the last unformatted input operation.

Below is the program to illustrate std::basic_istream::gcount():

Program 1:

// C++ code to illustrate std::gcount()

#include <bits/stdc++.h>
using namespace std;

// Driver Code
int main()
{

    // Initialise array of characters
    char arr[20];

    // Declare string stream
    istringstream stream("GeeksforGeeks");

    // Read the string in string stream
    stream.read(arr, sizeof arr);

    // Print the count of characters in
    // string "GeeksforGeeks"
    cout << "The count of characters"
         << " in the string "
         << " is " << stream.gcount()
         << endl;

    return 0;
}

Output:

The count of characters in the string  is 13

References: http://www.cplusplus.com/reference/istream/basic_istream/gcount/