帮做C/C++、C/C++语言代写留学生、代写C/C++程序、C/C++编程代做留学生、代写C/C++ MyString程序

日期：2018-09-15 01:50

CSI 1440

Project 1.5

“MyString”

Class description:

A MyString class should behave much like the c++ string class. Your class should use a dynamically allocated char

array to hold a character string. If the amount of memory allocated to the array is too small to complete some

necessary task (e.g., assigning a new character string to the object) your object should automatically double its

capacity until it is large enough to complete the task. If you discover that your object is using less than 25% of its

capacity your object should shrink to half its capacity until it is using more that 25% of its capacity.

Problem Statement:

Implement the MyString class using a header and implementation file named proj1-5-MyString.h and proj1-5-

MyString.cpp respectively. Even though MyString.h will be provided on the upload site, you should create your

own version for testing your code locally. Make sure to properly test your code on your own by creating a test

driver that fully tests every function created in the MyString class.

Deliverables:

proj1-5-MyString.h

proj1-5-MyString.cpp

proj1-5-testMain.cpp

Memory Requirements:

Your MyString should start with 10 bytes of allocated memory and should grow in size by doubling. So, we should

be able to predict the capacity of your MyString as acquiring a patten of 10, 20, 40, 80, … bytes of memory

depending of the number of characters stored.

Attributes:

int size – the number of characters currently stored in the string object. Do NOT count the NULL

character.

int capacity – the number of bytes currently allocated. This should always be at least size + 1. The extra

byte is needed to store the NULL character.

char *data – character pointer that points to an array of characters terminated with the NULL character.

Member Functions:

MyString( )

Constructor

MyString(const char *)

Constructor with an initialization character string

~MyString( )

Destructor

MyString(const MyString &)

Copy constructor

MyString& operator = (const MyString&)

Overloaded assignment operator, make a copy of MyString object

bool operator == (const MyString&) const

overloaded equivalence relational operator

char& operator [ ] (int)

overloaded [ ] should return a char by reference

void operator += (const MyString&)

overloaded += operator, use to concatenate two MyStrings

MyString operator + (const MyString&) const

Create a new MyString object that is the concatenation of two MyString

objects

void getline(istream&, char delimit = ‘\n’);

reads an entire line from a istream. Lines are terminated with delimit

which is newline ‘\n’ by default

int length( ) const;

return the length of the string

friend ostream& operator<< (ostream&, MyString&);

overloaded insertion operator