Task F. Making your own struct Particle

Write a new program particle.cpp (you may copy anything you want from 3d-space.cpp if need be).

The program should declare a new struct Particle, which

stores position and velocity of the particle, and

provides the following programming interface:

// dynamically allocate memory for a particle and initialize it Particle* createParticle(double x, double y, double z, double vx, double vy, double vz); // set its velocity to (vx, vy, vz) void setVelocity(Particle *p, double vx, double vy, double vz); // get its current position Coord3D getPosition(Particle *p); // update particle's position after elapsed time dt void move(Particle *p, double dt); // delete all memory allocated for the particle passed by pointer void deleteParticle(Particle *p); 

Implement these five functions. deleteParticle must delete all dynamically allocated memory that is created by createParticle function.

Here is a usage example of the structure and its programming interface. It models accelerated motion of a particle, which is done by making the velocity of the particle increase on each time step.

int main() { // make new particle Particle *p = createParticle(1.0, 1.5, 2.0, 0.1, 0.2, 0.3); double time = 0.0; double dt = 0.1; while(time  3.0) { // update its velocity setVelocity(p, 10.0 * time, 0.3, 0.1); // move the particle move(p, dt); time += dt; // reporting its coordinates cout  "Time: "  time  " \t"; cout  "Position: "  getPosition(p).x  ", "  getPosition(p).y  ", "  getPosition(p).z  endl; } // remove the particle, deallocating its memory deleteParticle(p); } 

Expected output:

$ ./a.out Time: 0.1 Position: 1, 1.53, 2.01 Time: 0.2 Position: 1.1, 1.56, 2.02 Time: 0.3 Position: 1.3, 1.59, 2.03 Time: 0.4 Position: 1.6, 1.62, 2.04 Time: 0.5 Position: 2, 1.65, 2.05 Time: 0.6 Position: 2.5, 1.68, 2.06 Time: 0.7 Position: 3.1, 1.71, 2.07 Time: 0.8 Position: 3.8, 1.74, 2.08 Time: 0.9 Position: 4.6, 1.77, 2.09 Time: 1 Position: 5.5, 1.8, 2.1 Time: 1.1 Position: 6.5, 1.83, 2.11 Time: 1.2 Position: 7.6, 1.86, 2.12 Time: 1.3 Position: 8.8, 1.89, 2.13 Time: 1.4 Position: 10.1, 1.92, 2.14 Time: 1.5 Position: 11.5, 1.95, 2.15 Time: 1.6 Position: 13, 1.98, 2.16 Time: 1.7 Position: 14.6, 2.01, 2.17 Time: 1.8 Position: 16.3, 2.04, 2.18 Time: 1.9 Position: 18.1, 2.07, 2.19 Time: 2 Position: 20, 2.1, 2.2 Time: 2.1 Position: 22, 2.13, 2.21 Time: 2.2 Position: 24.1, 2.16, 2.22 Time: 2.3 Position: 26.3, 2.19, 2.23 Time: 2.4 Position: 28.6, 2.22, 2.24 Time: 2.5 Position: 31, 2.25, 2.25 Time: 2.6 Position: 33.5, 2.28, 2.26 Time: 2.7 Position: 36.1, 2.31, 2.27 Time: 2.8 Position: 38.8, 2.34, 2.28 Time: 2.9 Position: 41.6, 2.37, 2.29 Time: 3 Position: 44.5, 2.4, 2.3