public static double computer1(double op1,double op2) {
		
		return op1+op2;		
		}
	public static double computer2(double op1,double op2) {	
		return op1-op2;
		}
	public static double computer3(double op1,double op2) {	
		return op1*op2;}
	public static double computer4(double op1,double op2) {	
		return op1/op2;}
}