创建一个英雄联盟英雄类，其属性有：name，sex，city，行为有speak（如我叫德玛西亚之力，性别男，来自德玛西亚），并写一个测试类

1.创建一个英雄联盟英雄类，其属性有：name，sex，city，行为有speak（如我叫德玛西亚之力，性别男，来自德玛西亚），并写一个测试类

2.编写程序输入一个年份和月份，并且输出该月份有多少天

2、参考代码：

/*输入一个年份和月份，输出该月的天数*/
#include<stdio.h>
int main()
{
    int year, month;
    printf("输入年和月（用空格分隔）：\n");
    scanf_s("%d %d", &year, &month);
    switch (month)
    {
    case 2:if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0))
        printf("29天！\n");
    else
        printf("28天！\n");
    break;
    case 4:
    case 6:
    case 9:
    case 11:printf("30天！\n"); break;
    default:printf("31天！\n"); break;
    }
    return 0;
}

第一题:

import java.util.stream.StreamSupport;

public class Hero {
    String name;
    String sex;
    String city;

    public Hero(String name, String sex, String city) {
        this.name = name;
        this.sex = sex;
        this.city = city;
    }

    public void speak() {
        System.out.println("我叫" + this.name + ", 性别" + this.sex + ", 来自" + this.city);
    }

    public static void main(String[] args) {
        Hero h = new Hero("德玛西亚之力", "男", "德玛西亚");
        h.speak();
    }
}
/*
输出结果:
我叫德玛西亚之力, 性别男, 来自德玛西亚

Process finished with exit code 0

 */

第二题:

import  java.util.Scanner;
public class days {
    public static void main(String[] args){
        Scanner s =new Scanner (System.in);
        System.out.println("请输入年份:");
        int year= s.nextInt();
        System.out.println("请输入月份:");
        int month= s.nextInt();
        int day =0;
        switch (month){
            case 1:
            case 3:
            case 5:
            case 7:
            case 8:
            case 10:
            case 12:
                day =31;
                break;
            case 4:
            case 6:
            case 9:
            case 11:
                day =30;
                break;
            case 2:
                if((year%4==0)&&(year%100!=0)||(year%400==0)){
                    day=29;
                }
                else{
                    day=28;
                }
                break;
        }
        System.out.println(year+"年"+month+"月有"+day+"天");
    }
}

/*
请输入年份:
2022
请输入月份:
12
2022年12月有31天

Process finished with exit code 0
 */

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