

1001 A+B Format¶

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

c++

#include<bits/stdc++.h>
using namespace std;
int main()
{
    long long a, b, flag = 0, res, cnt = 0, t;
    stack<char> s;

    cin >> a >> b;
    res = a + b;
    if(res >= 0)
        flag = 1;
    else
        res = -res;
    while(1)
    {
        t = res % 10;
        s.push(t + 48);
        cnt++;
        res = res /10;
        if(res == 0)
            break;
        if(cnt % 3 == 0)
            s.push(',');
    }
    if(!flag)
        cout << "-";
    while(!s.empty())
    {
        cout << s.top();
        s.pop();
    }   

    return 0;
}

最后更新: 2020-05-27