#include 
     
      #include 
      
       #include 
       
        using namespace std;using namespace std::placeholders; void test(int i, double d, const string &s){    cout << "i= " << i << " d= " << d <<" s= " << s << endl;}int test1(int i, double d, const string &s){    cout << "i= " << i << " d= " << d <<" s= " << s << endl;    return i;} int main(int argc, const char *argv[]){    function
        
          fp;    string s = "foo";    int a = 3;    double b = 6.7;    fp = bind(&test, a, b, s);    fp();     function 
         
           fp1;    double b2 = 4.6;    fp1 = bind(test, _1, b2, _2);    fp1(4, "kity");     function 
          
            fp2; fp2 = bind
           
            (test1, _1, b2, _2); int y = fp2(4, "kity"); cout << y << endl; auto fn = bind(test, 10, 23.3, "heko");//不用function指定函数参数， fn(); auto ff = bind(test, _1, _3, _2);//bind中的i参数类型与test的_j的参数类型对应 ff(12, "ppp", 12.5); class A { public: void print(int a, double x) { cout << a << " " << x << endl; } }; A a3; auto fclass= bind(&A::print, &a3, 11, 7.7); fclass(); return 0;} 参照 https://blog.csdn.net/aa838260772/article/details/39828207