//
// This is example code from Chapter 3.9 "Type safety" of
// "Programming -- Principles and Practice Using C++" by Bjarne Stroustrup
//

//------------------------------------------------------------------------------

int main()
{
    double x;            // we "forgot" to initialize:
                         // the value of x is undefined
    double y = x;        // the value of y is undefined
    double z = 2.0+x;    // the meaning of + and the value of  z is undefined
}

//------------------------------------------------------------------------------