学习中写的一段代码,为什么在vs2005 中可以正常编译,在vs2005 命令揭示无法正常编译,提示:检测到无法访问的代码。
代码如下:
using System;
using System.Collections.Generic;
using System.Text;class Hello
{
enum Loveyou
{
lovea = 10,
loveb =12,
lovec =30,
loved =39,
}
const int a =39 ;
static void Main()
{
switch (a)
{
case (int) Loveyou.lovea :
Console.WriteLine( "是 lovea ! \n");
break;
case (int) Loveyou.loveb :
Console.WriteLine("是 loveb ! \n" );
break;
case (int) Loveyou.lovec :
Console.WriteLine("是lovec ! \n");
case (int) Loveyou.loved:
Console.WriteLine(" 是loved ! \n");
break;
}
Console.WriteLine ( "Thank you ");
}
};
代码如下:
using System;
using System.Collections.Generic;
using System.Text;class Hello
{
enum Loveyou
{
lovea = 10,
loveb =12,
lovec =30,
loved =39,
}
const int a =39 ;
static void Main()
{
switch (a)
{
case (int) Loveyou.lovea :
Console.WriteLine( "是 lovea ! \n");
break;
case (int) Loveyou.loveb :
Console.WriteLine("是 loveb ! \n" );
break;
case (int) Loveyou.lovec :
Console.WriteLine("是lovec ! \n");
case (int) Loveyou.loved:
Console.WriteLine(" 是loved ! \n");
break;
}
Console.WriteLine ( "Thank you ");
}
};
switch(b)
{
case 10:
break;
......
}
因为a 是const switch 就没有意义了
改成
int c = a;
switch (c)
{
case (int) Loveyou
switch (a)
{