C#的一个小例子

今天去面试C#，直接机考，题目很简单，大致如下：

           建立一个person类，包含属性name和birthday。建立一个enum类，性别从里面取得。并把这个类加入到person类中 。person类中包含一个getAge函数。

           建立一个family类，类中包含一个list列表，包含函数getMembersCount()和重载函数getMembersCount(sex)。   

           建立一个console app名字为FamilyLib，创建一个family实体，并加入5个成员，2女3男。

           要求算出这个家庭的平均年龄和男性成员的平均年龄。

实现代码如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace familyLib
{
    class Program
    {
        static void Main(string[] args)
        {
            Family familyEx = new Family();
            Person perChild=new Person("Tom",DateTime.Parse("2009-02-03"),Sex.male);
            Person perMum = new Person("Lily", DateTime.Parse("1984-08-04"), Sex.female);
            Person perPapa = new Person("Bill", DateTime.Parse("1981-04-02"), Sex.male);
            Person perGrandma = new Person("momo", DateTime.Parse("1957-06-19"), Sex.female);
            Person perGrandPa = new Person("John", DateTime.Parse("1954-08-10"), Sex.male);
            familyEx.FamilyMembers.Add(perChild);
            familyEx.FamilyMembers.Add(perMum);
            familyEx.FamilyMembers.Add(perPapa);
            familyEx.FamilyMembers.Add(perGrandma);
            familyEx.FamilyMembers.Add(perGrandPa);
            float allAge  = 0;
            foreach (Person per in familyEx.FamilyMembers)
            {
                allAge = allAge + per.getAge();
            }
            float allAveAge = allAge / familyEx.getMembersCount();
            float allMaleAge = 0;
            foreach (Person per in familyEx.FamilyMembers)
            {
                if (per.Sex == Sex.male)
                {
                    allMaleAge = allMaleAge + per.getAge();
                }
            }
            float allMaleAveAge = allMaleAge/familyEx.getMembersCount(Sex.male);
       
            Console.WriteLine("所有成员的平均年龄为：{0}",allAveAge);
            Console.WriteLine("所有男性成员的平均年龄为：{0}", allMaleAveAge);
            Console.Read();
        }
    }
    enum Sex { male, female };
    class Person
    {
        private string name;
        private DateTime birthday;
        private Sex sex;

        
        
        public Person(string name, DateTime birthday,Sex sex)
        {
             this.name=name;
             this.birthday=birthday;
             this.sex = sex;
        }  
        public int getAge()
        {
            int age = DateTime.Now.Year - birthday.Year;
            return age;
        }
        internal Sex Sex
        {
            get { return sex; }
            set { sex = value; }
        }
    }
    class Family
    {
        private List<Person> familyMembers = new List<Person>();

        internal List<Person> FamilyMembers
        {
            get { return familyMembers; }
            set { familyMembers = value; }
        }   
        public int getMembersCount()
        {
            return familyMembers.Count;
        }
        public int getMembersCount(Sex sex)
        {
            int count = 0;
            foreach(Person per  in familyMembers)
            {
                if (per.Sex==sex)
                {
                    count = count + 1;
                }
            } 
            return count;
        }
    }
}

这个题目中包含的内容其实挺多的：enum，list，函数重载等等。

做个记录吧。