作业1

作业1

int n1;

n1 = 13; n1赋值13

int n2；

n2 = 17;

int n3;

n3 = n1 + n2; int运算，不改变大小，n3赋值30

System.out.println("n3 = " + n3);打印输出 n3= 字符串 + n3的值 30

int n4 = 38;

int n5 = n4 - n3;

System.out.println("n5 = " + n5);

作业2
1

public class HelloWorld { public static void main(String []args) { char a1 = '\n'; char a2 = '\t'; char a3 = '\r'; char a4 = ''; char a5 = '1'; System.out.println(a1); System.out.println(a2); System.out.println(a2); System.out.println(a4); System.out.println(a5); } }

作业3
public class HelloWorld {
public static void main(String[] args) {
String book1 = "龙族";
String book2 = "哈莫雷特";
System.out.println(book1+book2);
String sex1 = "男";
String sex2 = "女";
System.out.println(sex1 + sex2);
String P1 = "30";
String P2 = "60";
System.out.println(P1 + P2);
}
}
作业4
public class HelloWorld {
public static void main(String[] args) {
String x1 = "姓名";
String n1 = "年龄";
String c1 = "成绩";
String x2 = "性别";
String a1 = "爱好";
//结果
String name = "wang";
int age = 21;
int score = 100;
char gender = '男';
String hobby = "游戏";
System.out.println(x1 + "\t" + n1 + "\t" +c1 + "\t" + x2 + "\t" + a1+ "\n" + name+ "\t" + age+ "\t" + score+ "\t" + gender+ "\t" + hobby);
​
}
}