Lecture 14

Question 1

const Object* obj;

Answer 1

The referenced object obj is considered constant and can’t be modified

Question 2

void someMethod(const Object* obj)
Proper way to call this?

Answer 2

const Object obj();
someMethod(&obj);

Object* obj = new Object();
someMethod(obj);

Question 3

can const objects be passed by reference to non-const functions?

Answer 3

As there is no guarantee that the referenced object will not be modified when passed to a non-const parameter, the compiler blocks this.

Question 4

call someMethod
void someMethod(const string &str)

Answer 4

someMethod(string(“hellow world”));

Question 5

Can const be applied to return values?

Answer 5

Yes, this will return it while blocking write access within the object.

Question 6

benefits of
void someMethod(conststring &str)

Answer 6

Since str is passed by reference here, the system doesn’t have to copy its value
This makes the program more efficient in terms of run-time and in terms of memory use