ex2002.cpp

teach yourself C++ in 21 days 第五版

#include <iostream>
#include <stdio.h>
#include <string.h>
using namespace std;
class OutOfMemory
{
  public:
     OutOfMemory(char *);
     char* GetString() { return itsString; }
  private:
     char* itsString;
};

OutOfMemory::OutOfMemory(char * theType)
{
     itsString = new char[80];
     char warning[] = "Out Of Memory! Can't allocate room for: ";
     strncpy(itsString,warning,60);
     strncat(itsString,theType,19);
}

int main()
{

     try
     {
          int *myInt = new int;
          if (myInt == 0)
               throw OutOfMemory("int");
     }
     catch (OutOfMemory& theException)
     {
          cout << theException.GetString();
     }
     return 0;
}