public class Lianxi1 {
        // 属性 成员变量
        public String name;
        public String sex;
        public int age;
        public String birthday;
        
        public String showName(){
            System.out.println(name);
            return name;
        }
    

public class Data {
        public static void main(String[] args) {
            Lianxi1 lianxi=new Lianxi1();
            lianxi.name="list";
            lianxi.showName();//字母大小写
         }
}

public class Jisuanqi {

    public int add(int a,int b){
        return (a+b);
    }
    public int jian(int a,int b){
            return (a-b);
        }
    public int cheng(int a,int b){
            return (a*b);
        }
    public float chu(float a,float b){
            return (a/b);
        }
}

public class Data {
public static void main(String[] args) {
    Jisuanqi j=new Jisuanqi();
    int c=j.add(3,5);
    System.out.println(c);
    
    Jisuanqi h=new Jisuanqi();
    int d=h.jian(3,5);
    System.out.println(d);
    
    Jisuanqi g=new Jisuanqi();
    int e=g.cheng(3,5);
    System.out.println(e);
    
    Jisuanqi k=new Jisuanqi();
    float f=k.chu(5,3);
    System.out.println(f);
    }
}
}