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Hello.java
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185 lines (120 loc) · 2.88 KB
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public class Hello {
public static void main(String[] args) {
int score = 66;
if(score > 90) {
System.out.println("A");
} else if(score >= 80 && score < 90) {
System.out.println("B");
} else {
System.out.println("C");
}
/*
java.util.Scanner input = new java.util.Scanner(System.in);
System.out.println("请输入值：");
int level = input.nextInt();
*/
/*
* 变量部分必须是int、char、String类型
* 只能做等值判断，值部分不能重复
*/
/*
switch(level) {
case 1:
System.out.println("笔记本电脑-1");
System.out.println("笔记本电脑-2");
break;
case 2:
System.out.println("手机");
break;
case 3:
System.out.println("Head first Java");
break;
default:
System.out.println("鼓励奖");
}
*/
//多重选择
/*if(level == 1) {
System.out.println("笔记本电脑");
} else if(level == 2) {
System.out.println("手机");
} else if(level == 3) {
System.out.println("Head first Java");
} else {
System.out.println("鼓励奖");
}*/
/*
if(level == 1) {
System.out.println("笔记本电脑");
} else {
if(level == 2) {
System.out.println("手机");
} else {
if(level == 3) {
System.out.println("Head first Java");
} else {
System.out.println("鼓励奖");
}
}
}
*/
//int a = 10;
//int b = 20;
//三元表达式
//int c = a > b ? a : b;
/*
if(a > b) {
c = a;
} else {
c = b;
}*/
//System.out.println(c);
/*
java.util.Scanner input = new java.util.Scanner(System.in);
System.out.println("请输入账号：");
String name = input.next();
System.out.println("请输入密码：");
String password = input.next();
if("tom".equals(name) && "123123".equals(password)) {
System.out.println("登录成功");
} else {
System.out.println("账号或密码错误");
}
*/
/*
java.util.Scanner input = new java.util.Scanner(System.in);
System.out.println("请输入您的姓名：");
String name = input.next();
if("Tom".equals(name)) {
System.out.println("Welcome Tom");
}
*/
//if(name.equals("Tom")) {
// System.out.println("Welcome Tom");
//}
/*
//1. 获取用户的消费金额
java.util.Scanner input = new java.util.Scanner(System.in);
System.out.println("请输入消费金额：");
int money = input.nextInt();
//2. 判断金额是否满足-20的条件 > 100
if(money > 100) {
//money -= 20; // money = money - 20;
int temp = money / 100;
money = money - temp * 20;
}
//3. 输出用户应该支付的金额
System.out.println("您应支付：" + money + "元");
*/
//boolean result = 1 != 1;
//System.out.println(result);
/*
if(false) {
System.out.println("if代码块运行了 - 1");
System.out.println("if代码块运行了 - 2");
System.out.println("if代码块运行了 - 3");
}
System.out.println("The end!");
*/
}
}