1001 A+B Format （20 分) Calculate a+b and output the sum in standard format -- that is, the digits mu

1001 A+B Format （20 分)

Calculate a+b and output the sum in standard format -- that is, the digits must be separated into groups of three by commas (unless there are less than four digits).

Input Specification:

Each input file contains one test case. Each case contains a pair of integers a and b where −10​6​​≤a,b≤10​6​​. The numbers are separated by a space.

Output Specification:

For each test case, you should output the sum of a and b in one line. The sum must be written in the standard format.

Sample Input:

-1000000 9

Sample Output:

-999,991

做这道题的时候测试点四一直不通过，后来发现是没考虑都为零的情况。这时候就不执行while循环。

 

#include
#include
using namespace std;
int main()
{
    stack s;
    long int a,b,x;
    int bool_1=0;
    int j=0,k=0;
    cin>>a>>b;
    x=a+b;

   if(x==0)
   {
       cout<        return 0;
   }
    
    if(x<0)
    {
        x=x*(-1);
        bool_1=1;
    }
    while(x)
    {
        s.push(x%10);
        x/=10;
        j++;
    }
    while (!s.empty())
    {
        if(bool_1==1)
        {
              cout<<'-';
              bool_1=0;
        }
        j--;
        cout<         s.pop();

        if(j%3==0&&j!=0)
            cout<<',';
    }
    return 0;
}