the online compiler gives me errors when i inherit from a class to another in c++

Question

it gives me the error expected class name before token {

and i have included the parent class and typed the syntax of the inheritance

class child_class_name: access specifier parent_class_name{

Answer 1

Most probably you missed the semicolon (;) after the declaration of one of your classes.

class Shape
{
public:
    unsigned int numVertices;
}; // <<< this is the semicolon that you are most probably missing.

class Triangle : public Shape
{
    
};