ex6_05.cpp

Visual C++ 2005的源代码

// Ex6_05.cpp
// Nested try blocks
#include <iostream>
using std::cin;
using std::cout;
using std::endl;

int main(void)
{
  int height = 0;
  const double inchesToMeters = 0.0254;
  char ch = 'y';

  try                                            // Outer try block
  {
    while(ch == 'y'||ch =='Y')
    {
      cout << "Enter a height in inches: "; 
      cin >> height;                             // Read the height to be converted

      try                                        // Defines try block in which
      {                                          // exceptions may be thrown
        if(height > 100)
           throw "Height exceeds maximum";       // Exception thrown
        if(height < 9)
           throw height;                         // Exception thrown

         cout << static_cast<double>(height)*inchesToMeters 
              << " meters" 
              << endl;

      }
      catch(const char aMessage[])               // start of catch block which
      {                                          // catches exceptions of type
        cout << aMessage << endl;                // const char[]
      }
      cout << "Do you want to continue(y or n)?";
      cin >> ch;
    }
  }
  catch(int badHeight)
  {
    cout << badHeight << " inches is below minimum" << endl;
  }
  return 0;
}