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For my latest CS homework, I am required to create a class called Movie which holds title, director, year, rating, actors etc.
Then, I am required to read a file which contains a list of this info and store it in a vector of pointers to Movies.
I am not sure what the last line means. Does it mean, I read the file, create multiple Movie objects. Then make a vector of pointers where each element (pointer) points to one of those Movie objects?
Do I just make two vectors - one of pointers and one of Movies and make a one-to-one mapping of the two vectors?
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You can store pointers in a vector just like you would anything else. Declare a vector of pointers like this: vector<MyClass*> vec; The important thing to remember is that a vector stores values without regard for what those values represent.
An ordinary vector encountered in C++ programming, is a vector of objects of the same type. These objects can be fundamental objects or objects instantiated from a class. This article illustrates examples of vector of pointers, to same object type.
Declaration of an Array of Pointers in C In simple words, this array is capable of holding the addresses a total of 55 integer variables. Think of it like this- the ary[0] will hold the address of one integer variable, then the ary[1] will hold the address of the other integer variable, and so on.
Use -> Notation to Access Member Functions From Pointer to a Vector. vector member functions can be called from the pointer to the vector with the -> operator. In this case, we are passing the pointer to the vector to a different function.
It means something like this:
std::vector<Movie *> movies; Then you add to the vector as you read lines:
movies.push_back(new Movie(...)); Remember to delete all of the Movie* objects once you are done with the vector.
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