Lab 5

1. Write a class in C++ that has the following definition:

class Number
{
   // add data members
public:
   Number(const char * value, int base); // where base is between 2 and 16
   ~Number();

   // add operators and copy/move constructor

   void SwitchBase(int newBase);
   void Print();
   int  GetDigitsCount(); // returns the number of digits for the current number
   int  GetBase(); // returns the current base
}

Organize the code in the following way:

• a header file called Number.h
• a cpp file called Number.cpp that contains the source code for class Number
• a main file called main.cpp that contains the main function and has an example on how to use Number. The example must include using all methods from the class.
• add the following operators: addition, subtraction, index operator, relation operators (> , < , >= , <=, ==, etc)
• add copy & move constructors and move assignment operator
• when performing operations with two Number object that have a different base, the result (except for the relation and index operators) will have the biggest base of the two Number instances.
• for addition and subtraction use friend functions
• implement the -- operator with the following syntax: if used in a prefix form it will remove the first (most significant digit) from the number; if used in a post-fix form it will remove the last (least significant) digit from the number;

Example

int main()
{
   Number n1("10110010",2);
   Number n2("734",8);
   Number n3("FF",16);

   printf("n1 has %d digits and it is written in base %d\n",n1.GetDigitsCount(),n1.GetBase());
   for (int tr=0;tr<n1.GetDigitsCount();tr++)
   {
      printf("n1[%d]=%c\n",tr,n1[tr]);
   }
   n1.Print();
   n2.Print();
   n1 = (n2+n3-n1)+n1; // after this n1 will be in base 16
   n1.SwitchBase(2);
   n1.Print();

   if (n1>n2) printf("n1 is bigger than n2\n"); else printf("n2 is bigger than n1\n");

   Number n4=12345; // n4 will be in base 10
   n1 = 255; // n1 will be 11111111 (value 255 from base 10 in base 2)
   n4 += n1; 
   n4.Print();

   n4 = "13579"; // n4 mentains its base (10) and will be 13579
   n4.Print();
   --n4; // the first digit from n4 will be remove ==> n4 becomes 3579
   n4.Print();
   n4--; // the last digit from n4 will be remove ==> n4 becomes 357
   n4.Print();

   return 0;
}