int main(void) {
// const MyClass1 mine1; // fails to compile: we haven't defined a constructor without arguments
const MyClass1 mine1a=2;
const MyClass1 mine1b(2);
MyClass1 mine1c(2);
// int q1=mine1a.cc;// fails to compile: cc is a clandestine member of MyClass1, we don't need to know about it
int q2=mine1a.getvalue(); // ok
int q3=mine1b.getvalue(); // ok
// int q4=mine1a.getvalue_nonconst(); // fails to compile: mine1a is a const object, and the compiler has no way
// to know that the function getvalue_nonconst() is not modifying it, so,
// like an over-cautious parent it throws a compile error, keeping us safe.
int q5=mine1c.getvalue_nonconst(); // ok
std::cout << "cc for 'const MyClass1 mine1a=2' : " << q2 << std::endl;
std::cout << "cc for 'const MyClass1 mine1b(2)' : " << q3 << std::endl;
std::cout << "cc for 'MyClass1 mine1c(2)' : " << q5 << std::endl;
return EXIT_SUCCESS;
}
int main(void) {
// We can't use the default constructor on MyClass1 because the constructor
// needs to initialize the const member variable cc.
// const MyClass1 mine1; // fails to compile
const MyClass1 mine1a=2;
const MyClass1 mine1b(2);
MyClass1 mine1c(2);
// mine1a.cc is private.
// int q1=mine1a.cc;// fails to compile
int q2=mine1a.getvalue(); // ok
int q3=mine1b.getvalue(); // ok
// You can't call a non-const member function of a const instance, because
// it might modify the instance.
// int q4=mine1a.getvalue_nonconst(); // fails to compile
int q5=mine1c.getvalue_nonconst(); // ok
std::cout << "cc for 'const MyClass1 mine1a=2' : " << q2 << std::endl;
std::cout << "cc for 'const MyClass1 mine1b(2)' : " << q3 << std::endl;
std::cout << "cc for 'MyClass1 mine1c(2)' : " << q5 << std::endl;
return EXIT_SUCCESS;
}