题解 | #坐标移动#

#include <cctype>
#include <iostream>
#include <istream>
#include <string>
#include <sstream>
using namespace std;

bool isNum(const string &len) {
    for (auto item : len) {
        if (!isdigit(item)) return false;
    }
    return true;
}

void dealA(int &x, const string &len) {
    if (!isNum(len)) return;
    int move = stoi(len, 0);
    x -= move;
}

void dealD(int &x, const string &len) {
    if (!isNum(len)) return;
    int move = stoi(len, 0);
    x += move;
}

void dealW(int &y, const string &len) {
    if (!isNum(len)) return;
    int move = stoi(len, 0);
    y += move;
}

void dealS(int &y, const string &len) {
    if (!isNum(len)) return;
    int move = stoi(len, 0);
    y -= move;
}

void dealPos(int &x, int &y, string &pos) {
    if (pos.length() > 3 || pos.length() < 2) return;

    switch (pos[0]) {
        case 'A': dealA(x, string(pos.begin() + 1, pos.end())); break;
        case 'D': dealD(x, string(pos.begin() + 1, pos.end())); break;
        case 'W': dealW(y, string(pos.begin() + 1, pos.end())); break;
        case 'S': dealS(y, string(pos.begin() + 1, pos.end())); break;
    }
}

int main() {
    
    int x = 0, y = 0;
    string posStr, pos;

    cin >> posStr;
    istringstream iss(posStr);

    while (getline(iss, pos, ';')) {
        dealPos(x, y, pos);
    }
    cout << x << ',' << y << endl;


}
// 64 位输出请用 printf("%lld")