1 #include<cstdio>
 2 int main()
 3 {
 4     int a,b;
 5     while(scanf("%d%d",&a,&b)==2)
 6     {
 7         if(a==0 && b==0)    break;
 8         int c=0, ans=0;
 9         while(a!=0 || b!=0)
10         {
11             c = (a%10 + b%10 +c) > 9 ? 1:0;
12             ans += c;
 
13             a/=10; b/=10;
14         }
15         if(ans>1)  printf("%d carry operations.\n",ans);
16         else if(ans==1)  printf("1 carry operation.\n");
17         else     printf("No carry operation.\n");
18     }
19     return 0;
20 }

UVa10035 小學生算數（Primary Arithmetic）