牛客華爲機試之座標移動

#define _CRT_SECURE_NO_WARNINGS 1
#include<iostream>
#include<algorithm>
#include<string>
using namespace std;

#if 1

int main()
{

    string s;
    while (getline(cin, s))
    {
        int left = 0;
        int right = 0;
        int num = 0;
        auto first = s.begin();
        auto last = s.begin();
        while (last != s.end())
        {

            if (*last == ';')
            {
                if ((*first == 'A' || *first == 'D' || *first == 'W' || *first == 'S') && \
                    *(first + 1) >= '0'&&*(first + 1) <= '9'&&*(first + 2) >= '0'&&*(first + 2) <= '9' && (first + 3) == last)//判斷輸入是否知足條件（兩位數運算）
                {
                    switch (*first)
                    {
                    case'A':
                        left = left - (*(first + 1) - 48) * 10 - (*(first + 2) - 48);
                        break;
                    case'D':
                        left = left + (*(first + 1) - 48) * 10 + (*(first + 2) - 48);
                        break;
                    case'W':
                        right = right + (*(first + 1) - 48) * 10 + (*(first + 2) - 48);
                        break;
                    case'S':
                        right = right - (*(first + 1) - 48) * 10 - (*(first + 2) - 48);
                        break;
                    }
                }
                else
                if ((*first == 'A' || *first == 'D' || *first == 'W' || *first == 'S') && *(first + 1) >= '0'&&*(first + 1) <= '9' && (first + 2) == last)//判斷輸入是否知足條件（一位數運算）
                {
                    switch (*first)
                    {
                    case'A':
                        left = left - (*(first + 1) - 48);
                        break;
                    case'D':
                        left = left + (*(first + 1) - 48);
                        break;
                    case'W':
                        right = right + (*(first + 1) - 48);
                        break;
                    case'S':
                        right = right - (*(first + 1) - 48);
                        break;
                    }
                }
                last++;
                first = last;
            }
            else
                last++;
        }
        cout << left << ',' << right << endl;
        s.clear();
    }
    return 0;
    }

#endif