PAT甲级1001水题飘过

 #include<iostream>
 using namespace std;

 int main(){
     int a, b;
     while(scanf("%d%d", &a, &b) != EOF){
         int c = a + b;
         if(c == ) printf("0\n");
         else{
             if(c < ){
                 printf("-");
                 c = -c;
             }
             int k[];
             int cnt = ;
             while(c != ){
                 int x = c % ;
                 c /= ;
                 k[cnt++] = x;
             }
             for(int i = cnt-; i >= ; i--){
                 if(i != cnt-){
                     printf("%03d", k[i]);
                 }else{
                     printf("%d", k[i]);
                 }
                 if(i != ) printf(",");
             }
             printf("\n");
         }
     }
     return ;
 }