its not a string. I mean you will need a constructor that can create enough memory to hold the array passed to your class and somehow copy the array to it. a constructor taking an int* and an int seems to fit the bill perfectly. an int member size and an int* member ptr kinda suggests that your teach wants you to use dynamic allocation and make your member funcs act on the object itself and not on passed in params. Remember when dealing with dynamic allocations it is important to consider copying operations carefully and also destruction.