Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://www.tutorialspoint.com/cpp_standard_library/cpp_unitbuf.htm below:

C++ ios::Unitbuf() Function

The C++ std::ios::unitbuf() function is a manipulator that sets the streams unit buffer mode. When this function is invoked, the stream is automatically flushed after each output operation, ensuring that data is immediately written to the output device.

This function is useful in real-time applications where immediate feedback is necessary, such as logging or interactive user interfaces.

Following is the syntax for std::ios::unitbuf() function.

ios_base& unitbuf (ios_base& str);

• str − It indicates the stream object whose format flag is affected.

This function returns the Argument str.

If an exception is thrown, str is in a valid state.

It modifies str. Concurrent access to the same stream object may cause data races.

In the following example, we are going to consider the basic usage of the unitbuf() function.

#include <iostream>
int main()
{
    std::cout << std::unitbuf;
    std::cout << "Welcome, ";
    std::cout << "To Everyone.!" << std::endl;
    std::cout << std::nounitbuf;
    return 0;
}

Output of the above code is as follows −

Welcome, To Everyone.!

Let's look at the following example, where unitbuf() causes each output to be flushed, making sure each count value appears on the screen every second as intended.

#include <iostream>
#include <chrono>
#include <thread>
int main()
{
    std::cout << std::unitbuf;
    for (int x = 1; x < 4; ++x) {
        std::cout << "Count: " << x << std::endl;
        std::this_thread::sleep_for(std::chrono::seconds(1));
    }
    std::cout << std::nounitbuf;
    return 0;
}

Following is the output of the above code −

Count: 1
Count: 2
Count: 3

ios.htm

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4