operator1.java

《Java2程序设计实用教程(第2版)》课件

//算术运算，整除与取余
         
public class Operator1
{
    public static void main( String args []) 
    {
        System.out.println("7 / 2 = "+(7/2));
        System.out.println("7.0 / 2 = "+(7.0/2));
        System.out.println("7 % 2 = "+(7%2));
        System.out.println("7.0 % 2 = "+(7.0%2));
        System.out.println("-7 % 2 = "+(-7%2));
        System.out.println("7 % -2 = "+(7%-2));
    }
}

/* 
程序运行结果如下：
7 / 2 = 3             //整除
7.0 / 2 = 3.5         //除法
7 % 2 = 1             //余数为整数 
7.0 % 2 = 1.0         //余数为浮点数    ？？这样定义有什么意义？实数哪里有余数的概念？
-7 % 2 = -1           //结果的符号与被除数相同
7 % -2 = 1

*/