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Throw your own exception class based on runtime_error

#include <iostream> #include <stdexcept> using std::cin; using std::cout; using std::endl; using std::runtime_error; class DivideByZeroException : public runtime_error { public:    DivideByZeroException::DivideByZeroException(): runtime_error( "attempted to  divide by zero" ) {} }; double quotient( int numerator, int denominator ) {    throw DivideByZeroException(); // terminate function    return 0; } int main() {     try     {        double result = quotient( 1, 1 );        cout << "The quotient is: " << result << endl;     }     catch ( DivideByZeroException &divideByZeroException )     {        cout << "Exception occurred: " << divideByZeroException.what() << endl;     }     return 0; } Exception occurred: attempted to divide by zero