1 #include 
     
       2 #include 
      
        3 using namespace std; 4  5 //继承自带的异常 6 class sizeerror :public exception 7 { 8 public: 9     sizeerror() :exception("尺寸大小异常")10     {11 12     }13 14     const char *what()15     {16         char *p = "尺寸大小异常";17         cout << "尺寸大小异常" << endl;18         return p;19     }20 };21 22 class print3d23 {24 public:25     print3d(double size)26     {27         if (size > 100)28         {29             throw &sizeerror();30         }31     }32 };33 void main()34 {35     try36     {37         print3d p(300);38     }39     catch (sizeerror *p)40     {41         p->what();42     }43     cin.get();44 }