List<Person> person = new List<Person>();
Person p1 = new Person("张三", 26, Gender.Male, "看书");
Person p2 = new Person("张四", 55, Gender.Male, "钓鱼");
List<Student> stu = new List<Student>();
Student s1 = new Student("李四", 26, Gender.Male, "电影", "S2T11");
Student s2 = new Student("李五", 20, Gender.Male, "电脑", "S2T11");
List<Teacher> tch = new List<Teacher>();
Teacher t1 = new Teacher("王五", 26, Gender.Male, "音乐", "S1,S2,Y2");
Teacher t2 = new Teacher("王六", 30, Gender.Male, "音乐", "S1,S2");
person.Add(p1);
person.Add(p2);
person.Add(s1);
person.Add(s2);
person.Add(t1);
person.Add(t2);
/////////////用for遍历出Student类型和Teacher类型///////////////////
for (int i = 0; i < person.Count; i++)
{
if (person[i] is Student)
{
((Student)person[i]).SayHi();
}
else if (person[i] is Teacher)
{
((Teacher)person[i]).SayHi();
}
}
//////////////////////////////
怎么用foreach来遍历出Student类型和Teacher类型
替换上面for的遍历
可以通过编译 而且用for可以遍历出Student类型和Teacher类型
我已经运行过了
现在想用foreach来替换 但是写了写foreach这里报错 不晓得怎么写了
基类 Person 子类 Student Teacher
C语言_023_输出显示不同类型数据_上