operatorclass.java

刘艺编著的java教程的课本习题加例题代码 很有用哦！

public class OperatorClass
{
   public static void main(String args[])
   {                
      int a=80,b=9;
      char oper='/';
      
      switch (oper)
      {
         case '+':      // 输出a+b
            System.out.println(a+"+"+b+"="+(a+b));	
            break;
         case '-':      // 输出a-b
            System.out.println(a+"-"+b+"="+(a-b));
            break;
         case '*':      // 输出a*b
            System.out.println(a+"*"+b+"="+(a*b));
            break;
         case '/':      // 输出a/b
            System.out.println(a+"/"+b+"="+((float)a/b));
            break;
         default:       // 输出字符串
            System.out.println("Unknown operator!!");
     }
  }
}