PAT甲级练习题A1001.A+B Format

最新推荐文章于 2022-07-16 22:49:31 发布

柯森锎

最新推荐文章于 2022-07-16 22:49:31 发布

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分类专栏： PAT甲级

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该博客介绍了PAT甲级编程题A1001，要求计算两个介于-1000000到1000000之间的整数a和b的和，并按每三位一组的格式输出。博主提供了样例输入和输出，并指出题目相对简单，理解英文描述即可解题。

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题目描述

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

Each input file contains one test case. Each case contains a pair of integers a and b where -1000000 <= a, b <= 1000000. The numbers are separated by a space.

Output

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

题目解析

这题并不难，和甲级的第一题难度差不多，看懂英文就OK了。

代码

#include<iostream>
#include<string>
using namespace std;

int main()
{
    int a, b, c, d;
    string out;
    cin >> a >> b;
    c = a + b;
    if (c < 0)
        d = -c;
    else
        d = c;
    int i = 1;
    do
    {
        char ch = '0' + d % 10;
        out = ch + out;
        d /= 10;
        if (i % 3 == 0 && d)
            out = "," + out;
        ++i;
    } while (d);
    if (c < 0)
        out = "-" + out;
    cout << out << endl;
    system("pause");
    return 0;
}