JAVA软件开发入门记录

 boolean类型的使用、算术运算符（%、/）的使用

1. 搭建 Java 开发环境
2. 掌握 Java 基本语法
3. 掌握条件语句
4. 掌握循环语句

import java.util.Scanner;
public class Myfour{
	
	public static void main(String [] arges){
		Scanner input = new Scanner(System.in);
		//a=T恤 b=网球鞋 c=网球拍
		double a=245;
		double b=570;
		double c=320;
		//输入购买商品 商品单价 商品购买数量 
		System.out.println("输入购买商品：");
		String shangpin = input.next();
		System.out.println("输入商品单价：");
		double danjia = input.nextInt();
		System.out.println("输入购买数量：");
		double shuliang = input.nextInt();
		//输入付款金额
		System.out.println("输入付款金额：");
		double jine = input.nextInt();
		//计算每种商品的总价格并打印
		double zongjia=(danjia*shuliang);
		System.out.println("*****消费单*****");
		System.out.println("购买物品"+"t单价"+"t个数"+"t金额");
		System.out.println("T恤tt245"+"t2"+"t490"+"n"+"网球鞋tt570"+"t1"+"t570"+"n"+"网球拍tt320"+"t1"+"t320");
		System.out.println("折扣：8折");
		System.out.println("消费总额："+zongjia);
		//计算总价格以及折扣价格（8折）并找零输出
		double zhehou=(zongjia*0.8);
		double zhaoling=(jine-(zongjia*0.8));
		System.out.println("实际缴费："+zhehou+" "+"n"+"找零"+zhaoling);
	}
}

import java.util.Scanner;

public class Myfive{
	public static void main(String [] aregs){
		Scanner input = new Scanner(System.in);
		System.out.println("输入四位卡号:");
		int kahao = input.nextInt();
		int kahao1 = kahao/1000;
		int kahao2 = kahao/100%10;
		int kahao3 = kahao/10%10;
		int kahao4 = kahao%10;
		if(kahao1+kahao2+kahao3+kahao4>20){
			System.out.println("该用户为幸运顾客");
			}else{System.out.println("该用户不是幸运顾客");
			}
	}
}

import java.util.Scanner;

public class Mysix{
	public static void main(String [] aregs){
		Scanner input = new Scanner(System.in);
		System.out.println("输入商品折扣:");
		double	zhe = input.nextDouble();
		boolean a,b,c;
		double xie = zhe*250;
		double bao = zhe*380;
		double wan = zhe*400;
		a=xie<100;
		b=bao<100;
		c=wan<100;
		System.out.println("鞋子价格低于100"+a);
		System.out.println("包价格低于100"+b);
		System.out.println("碗价格低于100"+c);
	}
}

****************************************************
import java.util.Scanner;

public class Myseven{
	public static void main(String [] aregs){
		Scanner input = new Scanner(System.in);
		System.out.println("输入商品折扣:");
		double	zhe = input.nextDouble();
		double xie = zhe*245;
		double bao = zhe*570;
		double wan = zhe*320;
		if(xie<100){System.out.println("鞋子价格低于100");}
		else{System.out.println("鞋子价格高于100");}
		if(bao<100){System.out.println("包价格低于100");}
		else{System.out.println("包价格高于100");}
		if(wan<100){System.out.println("碗价格低于100");}
		else{System.out.println("碗价格高于100");}
	}
}

周二至周六早上 8.30 点—晚上17.30点