C语言

 1 /*
 2    模拟登陆练习
 3 */
 4 #include <stdio.h>
 5 #include <string.h>
 6 int main() {
 7     int loop = 0;
 8     char buf[10];
 9     for (loop = 0; loop < 3; loop++) {
10         printf("请输入用户名：");
11         fgets(buf, 10, stdin);
12         if (strcmp(buf, "admin
")) {
13             continue;
14         }
15         printf("请输入密码：");
16         fgets(buf, 10, stdin);
17         if (!strcmp(buf, "123456
")) {
18             break;
19         }
20     }
21     if (loop < 3) {
22         printf("登陆成功
");
23     }
24     else {
25         printf("登陆失败
");
26     }
27     return 0;
28 }