一个简单的函数指针测试例子

 1 typedef void(*GTestFunPtr)(int, int);
 2 
 3 void test1(int a, int b)
 4 {
 5     std::cout << "test1:" << a + b << std::endl;
 6 }
 7 
 8 void test2(int a, int b)
 9 {
10     std::cout << "test2:" << a * b << std::endl;
11 }
12 
13 void test3(int a, int b)
14 {
15     std::cout << "test3:" << a - b << std::endl;
16 }
17 
18 void tetPtr(GTestFunPtr f, int a, int b)
19 {
20     (*f)(a, b);
21 }
22 
23 int main()
24 {
25     std::vector<GTestFunPtr> v;
26     std::cout << "test1:" << test1 << ", &test1" << &test1 << std::endl;
27     std::cout << "test2:" << test2 << ", &test2" << &test2 << std::endl << std::endl;
28     v.push_back(test1);
29     v.push_back(&test1);
30     v.push_back(test2);
31     v.push_back(&test2);
32 
33     std::cout << "print vector<GTestFunPtr>:" << std::endl;
34     for (std::vector<GTestFunPtr>::iterator it = v.begin(); it != v.end(); ++it)
35     {
36         std::cout << "&it:" << &it << ",&(*it):" << &(*it) << ",*it:" << *it << ",func=>";
37         (*it)(1, 2);
38     }
39 
40     std::cout << std::endl << "test argu" << std::endl;
41     tetPtr(test3, 10, 5);
42     return 0;
43 }