1.functional 接受全局函数

2.functional 接受lambda表达式

3.functional 接收静态成员函数

4.functional 接收成员函数

5.bind 绑定全局函数

6.bind 绑定成员函数

7.使用 placeholders占位

#include <iostream>
#include <functional>
#include <string>using namespace std;/** 1.functional 接受全局函数* 2.functional 接受lambda表达式* 3.functional 接收静态成员函数* 4.functional 接收成员函数* 5.bind 绑定全局函数* 6.bind 绑定成员函数* 7.使用 placeholders占位* */void print(string name,int age){cout << name << "="<< age << endl;
}class stu{
public:string read(string name,int age){return name+ to_string(age) +"岁在看书";}static void introduce(string name,int age){cout << "我是"<< name << age << "岁了"<< endl;}
};int add(int a,int b){return a+b;
}int main() {function<void (string,int)> f1= print;f1("小明",12);function<int (int,int)> f2 = [](int a,int b){return a+b;};int result = f2(1,2);cout << "result=" << result << endl;function<void (string,int)> fs = stu::introduce;fs("小红",15);function<string (stu,string,int)> fr = &stu::read;stu s1;fr(s1,"小丽",8);function<string (stu&,string,int)> fr2 = &stu::read;stu s2;fr2(s2,"小天",100);function<string (stu*,string,int)> fr3 = &stu::read;stu s3;fr3(&s3,"康康",26);auto b = bind(add,1,2);int result2 = b();cout << "result2 = "<< result2 <<endl;function<int ()> f3 = bind(add,1,3);int result3 = f3();cout << "result3 = "<< result3<<endl;stu ss;stu sa;auto b2 = bind(&stu::read,ss,"莎莉",19);function<string ()> f4 = bind(&stu::read,sa,"莎莉2",36);f4();stu s11;stu s12;auto b3 = bind(&stu::read,s11,placeholders::_1,85);b3("阿妹");function<string (string,int)> f5 = bind(&stu::read,s12,placeholders::_1,placeholders::_2);f5("野鸡",40);return 0;
}