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C-/C++-Quelltext

#include <iostream>
#include <cstdlib>
#include <cmath>

struct Entity
{
    float x;
    float y;
    float u;
    float v;
    float r;
};

int main(int argc, char** argv)
{
    Entity e[2];
    // Taking arguments from the commandline

    if (argc == 11)
    {
        for (int i = 0; i < 2; ++i)
        {
            e[i].x = atof(argv[i * 5 + 1]);
            e[i].y = atof(argv[i * 5 + 2]);
            e[i].u = atof(argv[i * 5 + 3]);
            e[i].v = atof(argv[i * 5 + 4]);
            e[i].r = atof(argv[i * 5 + 5]);
        }
    }
    // Entering them by hand

    else
    {
        for (int i = 0; i < 2; ++i)
        {
            std::cout << "Entity " << i + 1 << ":";
            std::cout << std::endl <<"X:";
            std::cin >> e[i].x;
            std::cout << std::endl <<"Y:";
            std::cin >> e[i].y;
            std::cout << std::endl <<"U:";
            std::cin >> e[i].u;
            std::cout << std::endl <<"V:";
            std::cin >> e[i].v;
            std::cout << std::endl <<"R:";
            std::cin >> e[i].r;
        }
    }
    
    float p = 2*(e[0].x*e[0].u+e[1].x*e[1].u-e[0].x*e[1].x-e[1].x*e[0].u-e[0].x*e[1].u+e[0].y*e[0].v+e[1].y*e[1].v-e[0].y*e[1].y-e[1].y*e[0].v-e[0].y*e[1].v)/(e[0].u*e[0].u+e[1].u*e[1].u-2*e[0].u*e[1].u+e[0].v*e[0].v+e[1].v*e[1].v-2*e[0].v*e[1].v);
    float q = (e[0].x*e[0].x+e[1].x*e[1].x+e[0].y*e[0].y+e[1].y*e[1].y-(e[0].r+e[1].r)*(e[0].r+e[1].r))/(e[0].u*e[0].u+e[1].u*e[1].u-2*e[0].u*e[1].u+e[0].v*e[0].v+e[1].v*e[1].v-2*e[0].v*e[1].v);
    if(p*p>=4*q)
    {
        float t1 = -p/2+sqrt(p*p/4-q);
        float t2 = -p/2-sqrt(p*p/4-q);

        std::cout << "t1: " << t1 << " t2: "<< t2 << std::endl;
    }

    return (0);
}