CSP-202309-2-坐标变换（其二）

解题代码

#include <iostream>
#include <vector>
#include <cmath>
#include <iomanip>
using namespace std;

struct MyOpt
{
    double k, theta;
};
int n, m, opt, s, e;
double para, x, y;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> m;
    vector<MyOpt>OptList(n + 1, { 1,0 });
    for (size_t i = 1; i <= n; i++)
    {
        cin >> opt >> para;
        if (opt == 1)
        {
            OptList[i].k *= OptList[i - 1].k * para;
            OptList[i].theta = OptList[i - 1].theta;
        }
        else if (opt == 2)
        {
            OptList[i].k = OptList[i - 1].k;
            OptList[i].theta += OptList[i - 1].theta + para;
        }
    }
    for (size_t i = 0; i < m; i++)
    {
        cin >> s >> e >> x >> y;
        x *= (OptList[e].k / OptList[s - 1].k), y *= (OptList[e].k / OptList[s - 1].k);
        double xx = x, yy = y;
        x = xx * cos(OptList[e].theta - OptList[s - 1].theta) - y * sin(OptList[e].theta - OptList[s - 1].theta);
        y = xx * sin(OptList[e].theta - OptList[s - 1].theta) + y * cos(OptList[e].theta - OptList[s - 1].theta);
        cout << fixed << setprecision(3) << x << " " << y << endl;
    }
    return 0;
}