1 #include <stdio.h>
2 #include <stdlib.h>
3
4 void addition()
5 {
6 int a, b;
7 printf("请输入2个数字：\n");
8 scanf("%d%d", &a, &b);
9 printf("%d + %d = %d\n", a, b, a + b);
10 }
11
12 void substraction()
13 {
14 int a, b;
15 printf("请输入2个数字：\n");
16 scanf("%d%d", &a, &b);
17 printf("%d - %d = %d\n", a, b, a - b);
18 }
19
20 void multiplication()
21 {
22 int a, b;
23 printf("请输入2个数字：\n");
24 scanf("%d%d", &a, &b);
25 printf("%d * %d = %d\n", a, b, a * b);
26 }
27
28 void division()
29 {
30 int a, b;
31 printf("请输入2个数字：\n");
32 scanf("%d%d", &a, &b);
33 while (b == 0)
34 {
35 printf("请重新输入：\n");
36 scanf("%d%d", &a, &b);
37 }
38 printf("%d / %d = %d …… %d", a, b, a / b, a % b);
39 }
40
41 void operation()
42 {
43 printf("输入数字选择对应的运算操作符\n");
44 printf("1:加法\t2:减法\n3:乘法\t4:除法\n0:退出\n");
45 int opera = 0;
46 scanf("%d", &opera);
47 try
48 {
49 if (opera == 1)
50 {
51 addition();
52 }
53 else if (opera == 2)
54 {
55 substraction();
56 }
57 else if (opera == 3)
58 {
59 multiplication();
60 }
61 else if (opera == 4)
62 {
63 division();
64 }
65 else if (opera == 0)
66 {
67 exit(0);
68 }
69 else
70 {
71 throw 1;
72 }
73 }
74 catch (int i)
75 {
76 printf("输入错误\n");
77 }
78 operation();
79 }
80
81 int main()
82 {
83 printf("欢迎使用计算机器！\n");
84 operation();
85 return 0;
86 }
