华为机试：坐标移动

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

int x = 0, y = 0;

void left_move(string str) {
    if (str.size() == 2) {
        if (str[1] >= '0' && str[1] <= '9') {
            x -= (str[1] - '0');
        }
    } else {
        if (str[1] >= '0' && str[1] <= '9' && str[2] >= '0' && str[2] <= '9') {
            x -= ((str[1] - '0') * 10 + (str[2] - '0'));
        }
    }
}

void right_move(string str) {
    if (str.size() == 2) {
        if (str[1] >= '0' && str[1] <= '9') {
            x += (str[1] - '0');
        }
    } else {
        if (str[1] >= '0' && str[1] <= '9' && str[2] >= '0' && str[2] <= '9') {
            x += ((str[1] - '0') * 10 + (str[2] - '0'));
        }
    }
}

void up_move(string str) {
    if (str.size() == 2) {
        if (str[1] >= '0' && str[1] <= '9') {
            y += (str[1] - '0');
        }
    } else {
        if (str[1] >= '0' && str[1] <= '9' && str[2] >= '0' && str[2] <= '9') {
            y += ((str[1] - '0') * 10 + (str[2] - '0'));
        }
    }
}

void down_move(string str) {
    if (str.size() == 2) {
        if (str[1] >= '0' && str[1] <= '9') {
            y -= (str[1] - '0');
        }
    } else {
        if (str[1] >= '0' && str[1] <= '9' && str[2] >= '0' && str[2] <= '9') {
            y -= ((str[1] - '0') * 10 + (str[2] - '0'));
        }
    }
}

int main() {
    // int a, b;
    // while (cin >> a >> b) { // 注意 while 处理多个 case
    //     cout << a + b << endl;
    // }
    char ch;
    string str;
    while (cin >> ch) {
        if (ch == ';') {
            if (str.size() > 3 || str.size() < 2) {
                str.clear();
            } else {
                switch (str[0]) {
                    case 'A':
                        left_move(str);
                        break;
                    case 'D':
                        right_move(str);
                        break;
                    case 'W':
                        up_move(str);
                        break;
                    case 'S':
                        down_move(str);
                        break;
                    default:
                        break;
                }
                str.clear();
            }
        } else {
            str.push_back(ch);
        }
    }
    cout << x << "," << y << endl;
    return 0;
}