// Fig. 13.1: fig13_01.cpp
// A simple exception handling example.
// Checking for a divide-by-zero exception.
#include <iostream>

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

// Class DivideByZeroException to be used in exception
// handling for throwing an exception on a division by zero.
class DivideByZeroException {
public:
DivideByZeroException()
: message( "attempted to divide by zero" ) { }
const char *what() const { return message; }
private:
const char *message;
};

// Definition of function quotient. Demonstrates throwing
// an exception when a divide-by-zero exception is encountered.
double quotient( int numerator, int denominator )
{
if ( denominator == 0 )
throw DivideByZeroException();

return static_cast< double > ( numerator ) / denominator;
}

// Driver program
int main()
{
int number1, number2;
double result;

cout << "Enter two integers (end-of-file to end): ";

while ( cin >> number1 >> number2 ) {

// the try block wraps the code that may throw an
// exception and the code that should not execute
// if an exception occurs
try {
result = quotient( number1, number2 );
cout << "The quotient is: " << result << endl;
}
catch ( DivideByZeroException ex ) { // exception handler
cout << "Exception occurred: " << ex.what() << '\n';
}

cout << "\nEnter two integers (end-of-file to end): ";
}

cout << endl;
return 0; // terminate normally
}




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