题解 | #坐标移动#

#include <iostream>
#include <string>
#include <sstream>
using namespace std;
int x=0;
int y=0;
bool IsDirect(const char & a){
    if(a=='A'||a=='W'||a=='D'||a=='S'){
        return true;
    }else{
        return false;
    }
}

void movepos(const char & c,int & num){
    switch(c){
        case 'A':x-=num;break;
        case 'D':x+=num;break;
        case 'W':y+=num;break;
        case 'S':y-=num;break;
    }
}

int main() {
    
    string s;
    int num;
    while (getline(cin,s,';')) { // 注意 while 处理多个 case
        if(s.size()<2||s.size()>3||!IsDirect(s[0])){
            continue;
        }
        bool Istwo=s.size()-2;
        if(!isdigit(s[1])||!isdigit(s[1+Istwo])){
            continue;
        }
        //stringstream ss(s.substr(1));
        //ss>>num;
        num=atoi(s.substr(1).c_str());
        movepos(s[0],num);
    }
    cout<<x<<","<<y;
}