HDU 1002

 1 #include <stdio.h>
 2 #include <stdlib.h>
 3 #include <string.h>
 4 
 5 
 6 int main(void)
 7 {
 8     char s1[1010], s2[1010];
 9     int a[1010], b[1010];
10     int i, j, N, m, icase = 0;
11 
12     scanf("%d", &N);
13     m = N;
14     while(m--)
15     {
16         memset(s1, 0, 1010*sizeof(char));
17         memset(s2, 0, 1010*sizeof(char));
18         memset(a, 0, 1010*sizeof(int));
19         memset(b, 0, 1010*sizeof(int));
20         scanf("%s", s1);
21         scanf("%s", s2);    
22         int alen = strlen(s1);
23         int blen = strlen(s2);
24         int c;
25         int len = 0;                     //和值的实际长度
26         
27         c = 0;
28         for(i = alen - 1; i > -1; i--) 
29             a[c++] = s1[i] - ‘0‘;
30         c = 0;
31         for(i = blen - 1; i > -1; i--)
32             b[c++] = s2[i] - ‘0‘;
33 
34         for(i = 0; i < alen; i++) {    //这里是alen>blen的情形
35             a[i] += b[i];
36             len = i;
37             if(a[i] > 9) {
38                 a[i + 1] += a[i] / 10;
39                 a[i] = a[i] % 10;
40                 len = i+1;
41             }
42         } 
43         if(alen < blen) {              //这里是alen<blen的情形
44             for(i = alen; i < blen; i++) {
45                 a[i] += b[i];
46                 len = i;
47                 if(a[i] > 9) {
48                     a[i + 1] += a[i] / 10;
49                     a[i] = a[i] % 10;
50                     len = i + 1;
51                 }
52             }
53         }
54         
55         
56         printf("Case %d:\n", ++icase);
57         printf("%s + %s = ", s1, s2);
58         
59         for(j = len; j > -1; j--)
60             printf("%d", a[j]);
61         
62         printf("\n");
63         if(icase != N)
64             printf("\n");
65         
66         
67     }
68     return 0;    
69 }