//18. Обработка на изключения: дефиниции, класическа обработка на //изключения; пример с деление на 0. // // Fig. 13.1: fig13_01.cpp // A simple exception handling example. // Checking for a divide-by-zero exception. #include // 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 } -------------------------------------------------------