public static bool Create/*创造*/ (string stuName, int stuAge, out StudentD result)
{
result = null;
if (string.IsNullOrEmpty(stuName))//如果学生的年龄是空的
{
return(false);
}
if (stuAge < 20 || stuAge > 80)
{
return(false);
}
result = new StudentD()
{
Name = stuName, Age = stuAge
};
return(true);
}
{ //输出形参不会创建新副本 类似引用
public void 展现()
{
double x = 0;
bool a = DoubleParser.TryParse("123", out x);//输出值类型形参
if (a)
{
Console.WriteLine(x + 1);
}
////////////////////////////////
StudentD stu = null;
bool stuBoll = StudentFactory.Create("xing", 100, out stu);//输出有引用类型参数
if (stuBoll)
{
Console.WriteLine("生产了学生名字是:{0},年龄是:{1}", stu.Name, stu.Age);
}
else
{
Console.WriteLine("参数有误");
}
}