calculator.java

设计模式代码

//
public class Calculator{
	private int total=0;
	//
	public void Operation(char operator,int operand){
		switch(operator){
			case '+': total+=operand;break;
			case '-': total-=operand;break;
			case '*': total*=operand;break;
			case '/': total/=operand;break;
		}
		System.out.println("Total="+this.total);
	}
}