package CUTexamples;

public class Triangle {
	
	double a = 1 ;
	double b = 2 ;
	double c = 3 ;
	
	public Triangle() {}
	
	public void setA(double a) { this.a = a ; }
	public void setB(double b) { this.b = b ; }
	public void setC(double c) { this.c = c ; }
	
	public void reset() { a=1 ; b=2 ; c=3 ; }

	public boolean isIsoleces() {
		if (a*b*c <= 0) return false ; // incorrect if two of them are negative!
		double d = a-b ;
		d = d * (b-c) ;
		if (d == 0) return true ; 
		// incorrect if it is a and c that are the same
		return false ;
	}
	
	public boolean isEquilateral() {
		return (a==b && b==c && a==c) ;
	}
	
	public boolean isScalene() {
		return (a!=b && b!=c && a!=c) ;
	}

	public boolean is(String ty) {
		if (ty.equals("equilateral")) return isEquilateral() ;
		if (ty.equals("isoleced")) return isIsoleces() ;
		if (ty.equals("scalene")) return isScalene() ;
		throw new IllegalArgumentException() ;
	}
	
}