C++学习笔记：指向函数的指针

 1 #include <stdio.h>
 2 
 3 int sum(int a, int b)
 4 {
 5      return a+b;
 6 }
 7 
 8 int minus(int a, int b)
 9 {
10      return a-b;
11 }
12 
13 int x(int a, int b)
14 {
15      return a*b;
16 }

 1 void counting(int (*p)(int, int), int a, int b)
 2 {
 3      int result = p(a, b);
 4      printf("result = %d\n", result);
 5 }
 6 
 7 int main()
 8 {
 9      //指向函数的指针
10      counting(sum, 1, 2);//counting(minus, 1, 2);   counting(x, 1, 2);
11      return 0;
12 }