Java零基础入门：运算符练习
public class Test04 {
public static void main(String[] args){
boolean raining = false;
if(raining){
System.out.println("外面下雨了，出门记得带一把伞哦！");
}else{
System.out.println("天气不错哦！");
}
boolean eatFull = true;
if(eatFull){
System.out.println("吃的好饱啊！");
}else{
System.out.println("还没有吃饱，再来份米饭！");
}
boolean sex = true;
if(sex){
System.out.println("男");
System.out.println("Hello world!");
}
else{
System.out.println("女");
}
java.util.Scanner scan = new java.util.Scanner(System.in);
System.out.print("请输入数字；");
int i = scan.nextInt();
if(i==1){
System.out.println("性别：男");
}else if(i==0){
System.out.println("性别：女");
}else{
System.out.println("对不起，你输入不合法！");
}
System.out.print("输入考试成绩：");
int score = scan.nextInt();
String grade = "大笨蛋";
if(score < 0 || score > 100){
grade = "对不起，您输入的成绩不合法！";
}else if(score >= 90){
grade = "优秀";
}else if(score >= 80){
grade = "良好";
}else if(score >= 70){
grade = "中等";
}else if(score >= 60){
grade = "及格";
}
System.out.println("成绩等级：" + grade);
}
}