std::cin, std::wcin

Header: <iostream>

The global objects std::cin and std::wcin control input from a stream buffer of implementation-defined type (derived from std::streambuf), associated with the standard C input stream stdin.

# Declarations

extern std::istream cin;

extern std::wistream wcin;

# Notes

The ‘c’ in the name refers to “character” (stroustrup.com FAQ); cin means “character input” and wcin means “wide character input”.

# Example

#include <iostream>
 
struct Foo
{
    int n;
    Foo()
    {
        std::cout << "Enter n: "; // no flush needed
        std::cin >> n;
    }
};
 
Foo f; // static object
 
int main()
{
    std::cout << "f.n is " << f.n << '\n';
}

# See also