1 // GrabCut_328.cpp : 定义控制台应用程序的入口点。
2 //
3
4 #include "stdafx.h"
5 #include<iostream>
6 using namespace std;
7
8 struct Teacher
9 {
10 char name[64];
11 int age;
12 };
13
14 void getTeacher(Teacher**P)
15 {
16 Teacher *tmp = NULL;
17 tmp = (Teacher*)malloc(sizeof(Teacher));
18 tmp->age = 33;
19 //p是实参的地址 *实参的地址 去间接的修改实参的值
20 *P = tmp;
21 //return 0;
22 }
23 void getTeacher2(Teacher* &myp)
24 {
25 //给mpy赋值 相当于给Main函数中的pT1赋值
26 myp = (Teacher*)malloc(sizeof(Teacher));
27 myp->age = 36;
28 //return 0;
29 }
30
31 int _tmain(int argc, _TCHAR* argv[])
32 {
33 Teacher *pT1 = NULL;
34 //C语言中的二级指针
35 getTeacher(&pT1);
36 cout << "age:" << pT1->age << endl;
37
38 //C++中的引用（指针的引用）
39 getTeacher2(pT1);
40 cout << "age:" << pT1->age << endl;
41
42 system("pause");
43 }
