CSCI204/MCS9204/CSCI804 Object and Generic Programming in C++ Laboratory Exercise 4 (Week 6)

Task: Overloading operators
We will reuse some definitions and implementations of the class BigInteger defined in the lab 3 for this task.
Define the class BigInteger in a file BigInteger.h and implement its member functions in a file BigInteger.cpp that can be used to store a large positive integer. The class contains two data members: a pointer of short integer and the size of the dynamic short integer array. Define the following member functions:
• The default constructor;
• An initialization constructor initializes a BigInteger instance with a char array, in which all elements are decimal digits.
• The copy constructor makes a deep copy from a BigInteger instance.
• The destructor;
• Define insertion operator and extraction operator for the class.
• Define assignment operator for the class that makes a deep copy from a BigInteger object.
• Define addition operator that returns a BigInteger object of addition result. Do not change the operands.
• Define multiplication operator for the class that returns a BigInteger object of
multiplication result. Do not change the operands.
• Define comparison operator “equals to” that returns the value “true” if two BigInteger objects contain the same values.
Write the driver program include main function in a file lab4Main.cpp to declare instances of BigInteger, test all the overloading operators defined above.
Be careful not to submit the solutions for the lab 4 task.
Compile the files by g++ –o task4 lab4Main.cpp BigInteger.cpp
And execute it. Your program should be run like the following example (Red data means input from keyboard)
./task4
Input a big integer for bi1: 567239745104730482394650169432
Input a big integer for bi2: 882323456205024318310561095
Initial bi3=1234567890
bi3 = bi1 + bi2 = 568122068560935506712960730527
bi3 = bi1 * bi2 = 500488932397662823233748695498247943120741026136737448040
bi1 is not equal to bi2
bi3 = bi2 = 882323456205024318310561095
bi3 is equal to bi2