函数指针实现加法操作

 1 double add(double x, double y)
 2 {
 3     return x + y;
 4 }
 5 
 6 //double (*Calulate)(double, double);//声明一个函数指针
 7 
 8 
 9 double  Calulate(double x ,double y, double (*Cal)(double, double))
10 {
11     return Cal(x,y);
12
13 }
14 
15 int main()
16 {
17     auto cal = Calulate(1.2,3.4, add);
18 }