1 #include <cstddef>
2 #include <cstdlib>
3 #include <iostream>
4 #include "string.h"
5 using namespace std;
6
7
8 void GetMemory(char **p,int num)
9 {
10 *p = (char *)malloc(sizeof(char)*num);
11 cout << "&p = " << p << endl;
12
13 }
14 char *GetMemory(char *p,int num)
15 {
16 p = (char *)malloc(sizeof(char)*num);
17 return p;
18 }
19 int main()
20 {
21 char *a = NULL;
22 GetMemory(&a, 10);//传了一个指向指针的指针，
23 strcpy(a,"helloworld");
24 cout << "&a = " << &a << endl;
25 cout << "a = " << a << endl;
26 cout << "*a = "<< *a <<endl;
27
28 char *b = NULL;
29 b = GetMemory(b,100);
30 strcpy(b, "hello");
31 cout << "b = " << b << endl;
32
33 return 0;
34 }
