1 #include<stdio.h>
 2 #include<string.h>
 3 int main()
 4 {
 5     char op1[1002],op2[1002];
 6     int c,i,j,n,m,s1[1002],s2[1002],len1,len2,count;
 7     count=1;
 8     scanf("%d",&n);
 9     m=n;
10     while(m--)
11     {
12         memset(s1,0,1002*sizeof(int));
13         memset(s2,0,1002*sizeof(int));
14         scanf("%s",op1);
15         scanf("%s",op2);
16         len1=strlen(op1);
17         len2=strlen(op2);
18         c=0;
19         for(i=len1-1;i>=0;i--)
20             s1[c++]=op1[i]-‘0‘;
21         c=0;
22         for(i=len2-1;i>=0;i--)
23             s2[c++]=op2[i]-‘0‘;
24         for(i=0;i<1002;i++)
25         {
26             s1[i]+=s2[i];
27             if(s1[i]>=10)
28             {
29                 s1[i]-=10;
30                 s1[i+1]++;
31             }
32         }
33         printf("Case %d:\n",count++);
34         printf("%s + %s = ",op1,op2);
35         for(i=1001;i>=0;i--)
36             if(s1[i])
37                 break;
38         for(j=i;j>=0;j--)
39             printf("%d",s1[j]);
40         printf("\n");
41         if(count!=n+1)
42             printf("\n");
43     }
44     return 0;
45 }