java 运算符表达式

/*
* Copyright (c) 2006, 2023, webrx.cn All rights reserved.
*
*/
package cn.webrx;
/**
* 
* 
Powered by webrx On 2023-02-07 17:23:31
*
* @author webrx [webrx@126.com]
* @version 1.0
* @since 17
*/
public class Op1 {
public static void main(String[] args) {
//++ --
 
 
double d = 1.56;
System.out.println(++d);//先++运行，再使用 2.56
System.out.println(d++);//先使用，再身++ 2.56
System.out.println(d);//3.56
int a = 3; //a = 3
int b = ++a;// b =4 a=4
System.out.println(b--);//4 b=3
System.out.println(b);//3
//程序在些行结束
//System.exit(0);
System.out.println("-------------------------------------------");
//+
System.out.println(+3);
System.out.println(3);
System.out.println(3 + 2);
System.out.println("hello:" + "李四");
//输出快捷键 psvm sout
System.out.println("hello" + 8);
//-
System.out.println(2 - 3);
System.out.println(-3);
//*
System.out.println(2 * 3);
System.out.println("*".repeat(10));
// / 求整商数 %取余
System.out.println(5 / 2);//2
System.out.println(5 % 2);//1
System.out.println(1.0 * 5 / 2);//2.5
//3.33
System.out.printf("%.2f%n", 1.0 * 10 / 3);
//3.59
System.out.printf("%.2f%n", 3.586);
}
}
 
 
 
求整商余数案例
/*
* Copyright (c) 2006, 2023, webrx.cn All rights reserved.
*
*/
package cn.webrx;
/**
* 
*
* @since 17
*/
public class Ex01 {
public static void main(String[] args) {
int a = 10;
int b = 2;
a = Integer.parseInt(args[0]);
b = Integer.parseInt(args[1]);
//÷×＋－
if (a % b == 0) {
System.out.printf("%d ÷ %d = %d%n", a, b, a / b);
} else {
System.out.printf("%d ÷ %d = %d ... %d%n", a, b, a / b, a % b);
}
}
}