Fork, Commit, Merge - Hard Issue (C++)

[Niko Hoffrén]

Fork, Commit, Merge - Hard Issue (C++)

Implement a Custom String Class with Basic Functionalities in C++

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Navigate to the tasks/c++/hard directory from the root of your project.
You will see three files: main.cpp, mystring.cpp and mystring.h.
You only need to modify mystring.cpp and mystring.h files for this task.

Task

Your objective is to create a basic custom string class named MyString with the following functionalities:

Constructors:

• Default constructor.
• Parameterized constructor to initialize from a given C-style string (character array).
• Copy constructor.

Destructor.

Member functions:

• length(): Return the length of the string.
• c_str(): Return the underlying C-style string (character array).
• append(MyString&): Append a given MyString object to the current string.
• compare(MyString&): Compare the current string with a given MyString object. Return 0 if they're the same, a negative number if the current string is lexicographically smaller, and a positive number otherwise.

Overloaded operators:

• Overload the assignment = operator for assignment of one MyString to another.
• Overload the addition + operator to concatenate two MyString objects.
• Overload the equality == operator to compare two MyString objects for equality.
• Overload the stream insertion << operator for easy printing of the MyString object.

Requirements

• Use dynamic memory allocation (e.g., new and delete) for string storage.
• Handle memory leaks and ensure proper memory management.
• The class should be robust against possible errors, such as null pointers.

Bonus

• Implement a substring(int start, int end) function that returns a new MyString object containing characters from start to end.

Tips

• Remember to check for null pointers before any operation.
• During memory allocation, always check if memory was successfully allocated.
• For string manipulation, you might find the C++ string functions like strcpy, strcat, etc., from cstring useful.

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To test the program you have to first make sure you are in the right directory:

cd tasks/c++/hard

Then compile the files:

g++ main.cpp mystring.cpp -o mystring_test

Then you can run the compiled program by running:

./mystring_test

Running the program should output:

Hello World
Both strings are equal!

If the program works as requested in the task, you are ready to make a pull request!

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To work with this issue, you need to have C++ installed to your local machine.
Check out README.md for more instructions of installing C++ and how to make a pull request.

Feel free to ask any questions here if you have some problems!

Also, kindly give this project a star to enhance its visibility for new developers!