The University of Iowa
The College of Liberal Arts and Sciences
Department of Computer Science
Lecture/Lab #11
Friends, inheritance
What's the difference between enum and enum class?
What's the difference between struct and class?
Is the following a valid C++ program?
int main() {
int n = 42;
int& r;
r = n;
std::cout << r << std::endl;
}
How about this one?
auto square( int n ) { return n * n; }
int main() {
int& i = 17;
std::cout << i << std::endl;
int& j = square( 2 );
std::cout << j << std::endl;
}
Modify a rational number implementation according to the exercise comments
Open the exercise template
Write your code, press Run to test
When you're done, grab your Repl's link and send it as a direct message to me (agurtovoy)
Click on the corresponding option in the "Lab11 exercises" poll in #general
struct point {
point() : x_( 0 ), y_( 0 ) {}
point( int x, int y ) : x_( x ), y_( y ) {}
int x() const { return x_; }
int y() const { return y_; }
private:
int x_;
int y_;
};
std::ostream& operator<<( std::ostream& out, point const& p )
{
return out << "(" << p.x_ << ", " << p.y_ << ")";
}
int main() {
point p( 17, -3 );
std::cout << p << std::endl;
}
struct car {
car( std::string const& make,
std::string const& model,
int year );
std::string make;
std::string model;
int year;
};
struct truck : car {
truck( std::string const& make,
std::string const& model,
int year, double capacity );
double capacity;
};
Complete the class hierarchy as outlined in the exercise's comments
Open the exercise template
Write your code, press Run to test
When you're done, grab your Repl's link and send it as a direct message to me (agurtovoy)
Click on the corresponding option in the "Lab11 exercises" poll in #general