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I need help with problem 133

 1 year ago
source link: https://www.codeabbey.com/index/forum_topic/29e8b9f1ba5782379b3540b40c423220
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I need help with problem 133

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Artem Tsatinyan     2022-10-05 20:43:28
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So,my code solves the problem from the example correctly, here is a screenshot of the trajectory drawn using sfml

Screen 1

But there are problems with real tasks

Screen 2
Screen 3

And i don't really get why it doesn't work correctly

Help me please

This is my code:

#include <iostream>
#include <cmath>

using namespace std;

int sign(double x) {
    if (x >= 0) {
        return 1;
    }
    else return -1;
}

int main() {
    double W, H, X, Y, R, Vx, Vy, A, dt = 0.00001, V;

    cin >> W >> H >> X >> Y >> R >> Vx >> Vy >> A;

    V = sqrt(Vx * Vx + Vy * Vy);

    while (V > 0) {
        if (X + Vx * dt < R || X + Vx * dt > W - R) Vx = -Vx;
        if (Y + Vy * dt < R || Y + Vy * dt > H - R) Vy = -Vy;
        X += Vx * dt;
        Y += Vy * dt;
        V -= A * dt;
        double cs = cos(atan(Vx / Vy));
        double sn = sin(atan(Vx / Vy));
        Vx = V * abs(cs) * sign(Vx);
        Vy = V * abs(sn) * sign(Vy);
    }

    cout << round(X) << " " << round(Y);
}
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