1 #include <stdio.h>
2 int main()
3 {
4 int a ,b,c;
5 printf("请输入第一个数字");
6 scanf("%d",&a);
7 printf("请输入第二个数字");
8 scanf("%d",&b);
9 printf("交换之前a=%d\tb=%d",a,b);
10 printf("\n");
11 a = a + b;
12 b = a - b;
13 a = a - b;
14 printf("交换之后a=%d\tb=%d",a,b);
15 printf("\n");
16 printf("---------------------------------");
17 printf("\n");
18 printf("交换之前a=%d\tb=%d",a,b);
19 printf("\n");
20 a = a - b;
21 b = a + b;
22 a = b - a;
23 printf("交换之后a=%d\tb=%d",a,b);
24 printf("\n");
25 printf("---------------------------------");
26 printf("\n");
27 printf("交换之前a=%d\tb=%d",a,b);
28 printf("\n");
29 c = a;
30 a = b;
31 b = c;
32 printf("交换之后a=%d\tb=%d",a,b);
33 printf("\n");
34 }