Redirecting function output to /dev/null

Question

I am using a library that is printing a warning message to cout or cerr. I don\'t want this warning message to reach the output of my program. How

Answer 1

Use ios::rdbuf:

#include 

void foo()
{
    std::cout << "Boring message. " << std::endl;
}

int main()
{
    ofstream file("/dev/null");

    //save cout stream buffer
    streambuf* strm_buffer = cout.rdbuf();

    // redirect cout to /dev/null
    cout.rdbuf(file.rdbuf());

    foo();

    // restore cout stream buffer
    cout.rdbuf (strm_buffer);

    std::cout << "Interesting message." << std::endl;
    return 0;
}