C++ bind working

bind.cpp

#include <iostream>

void print(int& i){
    std::cout << i << "\n";
}

int main(){
    int i = 10;
    // Binding function print
    auto foo = std::bind(&print, i);
    std::cout << "Calling bind-print: " ;
    foo();
    i = 30;
    std::cout << "Calling bind-print: ";
    foo();


    // Output of the bind didn't change even though we changed the value of i
    // To resolve this we can use std::ref(i) and pass that to bind

    auto bar = std::bind(&print, std::ref(i));
    std::cout << "Calling bind-print with std::ref input: ";
    bar();
    i = 20;
    std::cout << "Calling bind-print with std::ref input: ";
    bar();

    // Bind can swallow all the arguments which are passed to it.
    auto baz = std::bind(&print, std::ref(i));
    std::cout << "bind func can swallow all the extra arguments passed to it without complaining" << std::endl;
    std::cout << "baz(10,20,30,40): ";
    baz(10,20,30,40);
    return 1;
}

Compile: g++ bind.cpp -std=c++14 -o bind
Execute: ./bind