fig13_02.cpp

来自「《c＋＋大学教程》源码」· C++ 代码 · 共 71 行

// Fig. 13.2: fig13_02.cpp
// Demonstrating exception rethrowing.
#include <iostream>

using std::cout;
using std::endl;

#include <exception>

using std::exception;

// throw, catch and rethrow exception
void throwException() 
{
   // throw exception and catch it immediately
   try {
      cout << "  Function throwException throws an exception\n";
      throw exception();  // generate exception

   } // end try

   // handle exception
   catch ( exception &caughtException ) {
      cout << "  Exception handled in function throwException"
           << "\n  Function throwException rethrows exception";

      throw;  // rethrow exception for further processing

   } // end catch

   cout << "This also should not print\n";

}  // end function throwException

int main()
{
   // throw exception
   try {
      cout << "\nmain invokes function throwException\n";
      throwException();
      cout << "This should not print\n";

   } // end try

   // handle exception
   catch ( exception &caughtException ) {
      cout << "\n\nException handled in main\n";

   } // end catch

   cout << "Program control continues after catch in main\n";

   return 0;

}  // end main


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