环境Visual Studio 2012，具体代码如下

#include <iostream>#include <functional>#include <string>void PrintNumber(int num){    std::cout << num << std::endl;}struct Printer{    void Print(std::string print_str)    {        std::cout << print_str << std::endl;    }};struct NumPrinter{    void operator()(int num)    {        std::cout << num << std::endl;    }};int main(){    // 普通函数    std::function<void (int)> f_print_num = PrintNumber;    f_print_num(1024);    // 绑定普通函数    std::function<void ()> f_print_num_65535 = std::bind(PrintNumber, 65535);    f_print_num_65535();    // 类的成员函数    Printer printer;    std::function<void (Printer, std::string)> f_print = &Printer::Print;    f_print(printer, "f_print function");    // 成员函数    std::function<void (std::string)> f_printstr1 = std::bind(f_print, printer, std::placeholders::_1);    f_printstr1("printstr1 function");    // 成员函数，换种写法    std::function<void (std::string)> f_printstr2 = std::bind(&Printer::Print, printer, std::placeholders::_1);    f_printstr2("printstr2 function");    // 函数对象    std::function<void (int)> f_print_obj = NumPrinter();    f_print_obj(23333333);    system("pause");    return 0;}