1 #define  _CRT_SECURE_NO_WARNINGS
 2 #include <stdio.h>
 3 
 4 #include <stdlib.h>
 5 #include <time.h>
 6 void menu()
 7 {
 8     printf("**********************************\n");
 9     printf("*********** 1.play***************\n");
10     printf("*********** 0.exit***************\n
 
");
11     printf("**********************************\n");
12 }
15 void game()
16 {
17     int random_num = rand() % 100 + 1;
18     int input = 0;
19     while (1)
20     {
21         printf("請輸入猜的數字>:");
22         scanf("%d", &input);
23         if (input > random_num)
24         {
25             printf("
 
猜大了\n");
26         }
27         else if (input < random_num)
28         {
29             printf("猜小了\n");
30         }
31         else
32         {
33             printf("恭喜你，猜對了\n");
34             break;
35         }
36     }
37 }
38 int main()
39 {
40     int input = 0;
41     srand((unsigned)time(NULL));
 
42     do
43     {
44         menu();
45         printf("請選擇");
46             scanf("%d", &input);
47         switch (input)
48         {
49         case 1:
50             game();
51             break;
52         case 0:
53             break;
54         default:
55             printf("選擇錯誤,請重新輸入!\n");
56             break;
57         }
58     } while (input);
59     return 0;
60 }

//可實現反覆遊戲

//用srand((unsigned)time(NULL))設定時間種子，從而使得系統每次產生預猜的數字不一樣