Lab1_new

#include <iostream>
#include <clocale>

using namespace std;
class Tline
{
private:
    float a,b,c;
public:
    Tline()
    {
        a = 0;
        b = 0;
        c = 0;
    }

    Tline(float newa, float newb, float newc)
    {
        a = newa;
        b = newb;
        c = newc;
    }

    int printLine()
    {
        if((this->b>=0)&&(this->c>=0))
            cout<<this->a<<"x+"<<this->b<<"y+"<<this->c<<"=0"<<endl;
        else
            if((this->b<0)&&(this->c>0))
                cout<<this->a<<"x"<<this->b<<"y+"<<this->c<<"=0"<<endl;
            else
                if((this->c<0)&&(this->b>0))
                    cout<<this->a<<"x+"<<this->b<<"y"<<this->c<<"=0"<<endl;
                else
                    cout<<this->a<<"x"<<this->b<<"y"<<this->c<<"=0"<<endl;


        return 0;
    }

    bool checkDot(float x, float y)
    {
        return bool((this->a*x+this->b*y+c)==0);
    }
};

int main()
{
    setlocale(LC_ALL,"RU");
    float a, b, c, x, y;
    cout<<"Введите коэффициенты уравнения прямой"<<endl;
    cout<<"a=";
    cin>>a;
    cout<<"b=";
    cin>>b;
    cout<<"c=";
    cin>>c;
    Tline *line = new Tline(a,b,c);
    line->printLine();
    cout<<"Введите координаты точки для проверки принадлежности к прямой"<<endl;
    cout<<"x=";
    cin>>x;
    cout<<"y=";
    cin>>y;
    cout<<line->checkDot(x,y);
    system("pause");
    return 0;
}