Programming in C++ List :: List() ∥ Constructor ∥Post: length==0 length =0; void List: Insert(/*in */Item Type item / Pre: length MAX LENGTH & item is assigned //Post: datallength @entry== item & length ==length @entry 1 data length1= item length++; 1010 List :: List ( ) // Constructor // Post: length == 0 { length = 0 ; } void List :: Insert ( /* in */ ItemType item ) // Pre: length < MAX_LENGTH && item is assigned // Post: data[length@entry] == item && length == length@entry + 1 { data [ length ] = item ; length++ ; }