Pointers in c/c++. A small tutorial covering basics of Pointers, dynamic memory allocation, allocating blocks of memory and comparison of pointers and arrays. Within the computer’s memory, every stored data item occupies one or more adjacent memory cells. The number of memory cells required to store a data item depends on the type of data item. For example, a single character will be stored in 1 byte of memory integer usually requires two adjacent bytes, a floating point number may require four adjacent bytes.