ecgr1

public class EcGrad1{
    private double a; // coeficientii ec. aX+b=0;
    private double b;
    public EcGrad1 (double a, double b){ // constructor
    this.a=a;
    this.b=b;
    }
    public void setA(double a){ // setari a si b
    this.a=a;
    }
    public void setB(double b){
    this.b=b;
    }
    public double getA(){ // returnari a si b
    return a ;
    }
    public double getB(){
    return b ;
    }
    public void afisare1(){ // metoda de afisare ar trebui scrisa in programul de aplicatie
    if (a!=0){ // si nu in clasa
    if (a!=1.0) System.out.print(getA()+"*X");
    else System.out.print("X");
    }
    if(getB()<0) System.out.print(getB()+"=0");
    else System.out.println("+"+getB()+"=0");
    }
    public void rezolva1(){ // rezolvare
    if (a!=0) System.out.println("ec. are sol. unica:"+ -b/a);
    else if (b!=0) System.out.println("ec. nu are solutii");
    else System.out.println("ec. are o inf. de solutii reale");
    }

public static void main(String args[])
   {EcGrad1 e1 = new EcGrad1(12,5);
    e1.afisare1();
    e1.rezolva1();
    e1.setA(0);
    e1.setB(0);
    e1.afisare1();
    e1.rezolva1();
    e1.setA(0);
    e1.setB(1);
    e1.afisare1();
    e1.rezolva1();
   }
    }