operator.java

用java编写的实现计算器的众多功能 方便实用

package lab5;

public enum Operator {
	ADD, SUB, MUL, DIV, COS, SIN, TAN, CE, MR, MC, MS, M, ASSIGN;

	public String toString() {

		switch (this) {

		case ADD:
			return "+";
		case SUB:
			return "-";
		case DIV:
			return "/";
		case MUL:
			return "*";
		case COS:
			return "cos";
		case SIN:
			return "sin";
		case TAN:
			return "tan";
		case CE:
			return "CE";
		case MR:
			return "MR";
		case MC:
			return "MC";
		case MS:
			return "MS";
		case M:
			return "M+";
		case ASSIGN:
			return "=";
		default:
			return "Unkown Operator";

		}
	}

	public static int OperatorType(Operator op) {
		int type = 0;

		switch (op) {

		case ADD:
		case SUB:
		case MUL:
		case DIV:
			type = 2;
			break;

		case COS:
		case SIN:
		case TAN:
			type = 1;
			break;
		
		default:
			type = 3;
			break;
		}

		return type;

	}
}