lt07.cpp

一、教学目的： 能理解C++中运算符重载的需要性

enum FileErrors{nonExist,wrongFormat, diskSeekError,...};

int f()
{
  try
  {
    //...
    throw wrongFormat;
  }

  catch(FileErrors fe)
  {
    switch(fe)
    {
      case nonExist:
          //...
      case wrongFormat:
          //...
      case diskSeekError:
          //...
    }
  }
  //...
}