How do I pass a function as parameter?

Question

What is the fastest and shortest way to pass a function as parameter of another function without using other libraries other than the std one in just one line?

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Answer 1

C++11 provides anonymous functions:

forloop(3, []{ std::cout "Hi!"; });

Example:

#include 
#include 

 void forloop(int times, std::function f) {
     for(int i = 0; i < times; i++) {
         f();
     }
 }

int main() {
    forloop(3, [] () { std::cout << "Hello world"; });
}