111 lines
2.2 KiB
C++
111 lines
2.2 KiB
C++
#include <cmath>
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#include <iostream>
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#include <string>
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using namespace std;
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class Hop {
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private:
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double maxheight, startTime;
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bool isHalfed;
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const double loss = 0.7;
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const double g = 9.8;
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public:
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Hop(double initHeight, bool starter);
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~Hop();
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double hopTime();
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double getMaxVelocity();
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double getMaxHeight();
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double getPosition(double time);
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double getVelocity(double time);
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double getEndTime();
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void makeHop();
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};
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Hop::Hop(double initHeight, bool starter)
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{
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maxheight = initHeight;
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isHalfed = starter;
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startTime = 0;
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}
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double Hop::hopTime()
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{
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if (isHalfed)
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return sqrt((2 * maxheight) / g);
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return 2 * sqrt((2 * maxheight) / g);
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}
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double Hop::getPosition(double time)
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{
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if (isHalfed)
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return maxheight - g * (time - startTime) * (time - startTime) / 2;
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return (time - startTime) * getMaxVelocity() - g * (time - startTime) * (time - startTime) / 2;
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}
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double Hop::getVelocity(double time)
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{
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if (isHalfed)
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return 0 - g * (time - startTime);
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return getMaxVelocity() - g * (time - startTime);
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}
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double Hop::getMaxVelocity()
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{
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return sqrt(2 * g * maxheight);
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}
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void Hop::makeHop()
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{
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startTime += hopTime();
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maxheight *= 0.7;
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isHalfed = false;
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}
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double Hop::getEndTime()
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{
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return startTime + hopTime();
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}
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double Hop::getMaxHeight()
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{
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return maxheight;
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}
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Hop::~Hop()
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{
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}
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int main()
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{
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double init_height, time;
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int i = 0;
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cout << "Enter initial height in meters: ";
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cin >> init_height;
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cout << "Enter desired time in seconds: ";
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cin >> time;
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if (init_height > 0.0 && time > 0.0) {
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cout << "Modelling...\n";
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Hop a(init_height, true);
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while (a.getEndTime() < time && i < 100) {
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a.makeHop();
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i++;
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}
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if (a.getEndTime() < time && i == 100) {
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cerr << "Too many iterations. Aborting." << endl;
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return 2;
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}
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cout << "Hop №" << i << endl;
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cout << "Height is " << a.getPosition(time) << " m\n";
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cout << "Velocity is " << a.getVelocity(time) << " m/s\n";
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return 0;
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} else {
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cout << "Illegal height or time.\n";
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return 1;
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}
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return 0;
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} |