1 import java.util.Scanner;
2
3 public class gongzi{
4 public static void main(String[] args){
5 System.out.println("请输入基本工资: ");
6 Scanner sc = new Scanner(System.in);
7 double i = sc.nextDouble();
8 double a = 1200.0;
9 double b = 750.0;
10 double sum = a + b + i;
11 System.out.println("该员工的工资细目为:");
12 System.out.println("基本工资为: " + i);
13 System.out.println("物价津贴为: " + a);
14 System.out.println("房租津贴为: " + b);
15 System.out.println("员工薪水是: " + sum);
16 }
17 }
1 import java.util.Scanner;
2
3 public class chou{
4
5 public static void main(String[] args){
6 System.out.println("请输入4位会员卡号:");
7 Scanner sc = new Scanner(System.in);
8 int i = sc.nextInt();
9 if(i >= 1000 && i <= 9999){
10 int a,b,c,d,sum;
11 a = i/1000;
12 b = i/100%10;
13 c = i/10%10;
14 d = i%10;
15 sum = a + b + c + d;
16 System.out.println("会员卡号" + i +"各位之和: " + sum);
17 }else {
18 System.out.println("您输入的卡号有误!");
19 }
20 }
21 }
1.变量
临时存放数据，方便以后再来使用,所以可以改变
变量可以有多种类型: 基本数据类型: boolean(true,false),float,double,byte,char,int ,short,
long
引用数据类型： 类，接口，数组
2.运算符 ： + ， - ，* ，/,%, ++,--;
3.数据转换:大类型向小类型转换要强制转,有精度丢失;
小类型向大类型没问题
4.键盘的输入: import java.util.Scanner;
Scanner sc = new Scanner(System.in);
int i = sc.nextInt();
double d = sc.nextDouble();
String str = sc.nextLine();
