swithdemo.java

来自「本书结合作者丰富的实践经验和深厚的理论基础」· Java 代码 · 共 29 行

// SwitchDemo.Java
public class SwithDemo
{
	public static void main(String args[])throws Exception
   {
	  int a=50,b=5;
char c;
       System.out.println("请输入运算符：");
       c = (char)System.in.read();       
       switch( c )
       {
			case '+':
              System.out.println(a+"+"+b+"="+(a+b));
              break;
			case '-':
              System.out.println(a+"-"+b+"="+(a-b));
              break;
			case '*':
              System.out.println(a+"*"+b+"="+(a*b));
              break;
			case '/':
              System.out.println(a+"/"+b+"="+(a/b));
              break;
           default:
             System.out.println("Unknown expression!");
       }
   }
}// end class