读取文本文件并将每行保存为字符串(c++)

I have a little question. I'm currently doing a school assignment in c++ and the task is to have something similar to a small library, where the user can ask to look at a book and then the program will print out the release year, author, how many pages etc etc. The assignment is focused on vectors and arrays, but I thought a smart way of doing it could be to have the release years in a text file and then save those years in an array. When I first it, everything was saved in characters, (meaning "1","8","8","5"), when I'd actually like it to save every line in the text document as a string in the array, or something similar (like this: "1885",). I couldn't really figure out how to split them up into strings then. I then talked a bit to a friend and this is where I am with my code now, it's not really working and at the moment I have no idea how I am supposed to solve it. I have a little question. I'm currently doing a