题解 | #坐标移动#

#include <iostream>
#include <string>
#include <cctype>
#include <vector>
using std::cin;
using std::cout;
using std::endl;
using std::string;
using std::vector;

class Point {
public:
    Point(int x, int y)
        : _x(x), _y(y)
    {}

    void print() {
        cout << _x << "," << _y << endl;
    }

    Point remove_function(char ch, int num) {
        switch (ch) {
        case 'A':
            return Point(_x - num, _y);
        case 'S':
            return Point(_x, _y - num);
        case 'W':
            return Point(_x, _y + num);
        case 'D':
            return Point(_x + num, _y);
        default:
            return *this; // 返回当前对象
        }
    }

private:
    int _x;
    int _y;
};

int main(int argc, char* argv[]) {
    Point p(0, 0);
    Point p1(0, 0);
    vector<string> vec;
    char ch;
    int num;
    string str;

  /*  while (getline(cin, str, ';')) {
        vec.push_back(str);
    }*/
 
    getline(cin, str);
   

    for (int i = 0; i < str.size(); i = i + 1)
    {
        string temp;
        while (str[i] != ';')
        {
            temp.push_back(str[i]);
            i = i + 1;
        }
        vec.push_back(temp);
    }

   /* for (const auto& elem : vec) {
        cout << elem << " ";
    }
    cout << endl;*/

    for (const auto& cmd : vec) {
        if (cmd.length() == 2 && isalpha(cmd[0]) && isdigit(cmd[1])) {
                ch = cmd[0];
                num = cmd[1] - '0'; // 假设数字只有一位
                /*cout << "数字只有一位num =" << num;*/
                p1 = p.remove_function(ch, num);
                p = p1; // 更新当前点
                
        }
        else if (cmd.length() == 3 && isalpha(cmd[0]) && isdigit(cmd[1]) && isdigit(cmd[2])) {
            ch = cmd[0];
            num = (cmd[1] - '0' )* 10 + cmd[2] - '0'; // 假设数字有两位
        /*    cout << "数字有两位num =" << num << endl;*/
            p1 = p.remove_function(ch, num);
            p = p1; // 更新当前点
        }
        
    }

    p1.print();
    return 0;
}