1898. 【认证试题】遥控小车

 

思路：选取一个方向数组，判定当前的方向，对应的坐标相加

#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
// 定义北东南西四个方向
int g_to[4][2] = {{0, 1}, {1, 0}, {0, -1}, {-1, 0}};
const int LOOP = 4;
class Solution {
public:
    // 待实现函数，在此函数中填入答题代码;
    string ExecCommand(const string &commands) const
    {
        string result;
        int direction = 0;
        int x = 0;
        int y = 0;
        for (auto i : commands) {
            if (i == 'G') {
                x += g_to[direction][0];
                y += g_to[direction][1];
            } else if (i == 'L') {
                direction = (direction + LOOP - 1) % LOOP;
            } else if (i == 'R') {
                direction = (direction + LOOP + 1) % LOOP;
            }
        }
        result = "(" + to_string(x) + ","+ to_string(y) + ")";
        return result;
    }

};

inline string ReadLine()
{
    string line;
    getline(cin, line);
    return line;
}

int main()
{
    string commands = ReadLine();

    Solution solu;
    string result = solu.ExecCommand(commands);
    cout << result;
    return 0;
}