指针的操作

 1 #include <stdio.h>
 2 int main()
 3 {
 4     int num1 = 1024;
 5     int num2 = 2048;
 6     int *ptr1;
 7     int *ptr2;
 8 
 9     ptr1 = &num1;
10     ptr2 = &num2;
11     printf("num1的值是%d\tnum1的地址是：%p\n",num1,ptr1);
12     printf("num2的值是%d\tnum2的地址是: %p\n",num2,ptr2);
13 
14     //变量1的值，赋给变量2
15 
16     //num2 = num1; = *ptr2 = *ptr1;
17 
18 //    *ptr2 = *ptr1;
19 //    printf("重新变量赋值：\n");
20 //    printf("num1的值是%d\tnum1的地址是：%p\n",num1,ptr1);
21 //    printf("num2的值是%d\tnum2的地址是: %p\n",num2,ptr2);
22 
23     ptr2 = ptr1;  //指针的操作
24     printf("重新地址赋值：\n");
25     printf("num1的值是%d\tnum1的地址是：%p\n",num1,ptr1);
26     printf("num2的值是%d\tnum2的地址是: %p\n",num2,ptr2);
27 
28     *ptr2 = 11111111;
29     printf("重新赋值：\n");
30     printf("num1的值是%d\tnum1的地址是：%p\n",num1,ptr1);
31     printf("num2的值是%d\tnum2的地址是: %p\n",num2,ptr2);
32 }
posted on 2021-07-28 11:25 Bytezero! 阅读(60) 评论(0) 编辑收藏举报