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Write a C++ program that:
- Implements a class with three data members {sum (int), count (int), avg (float)}.
- Implement the following 3 member functions:
- The first function is a default constructor which initializes sum and count to zero.
- The second function is named add which receives an integer number as input parameter and add it to sum and increment count by 1.
- The third function is named output which divides the sum over count and save it to avg then print the avg value).
Then, write a program to read numbers from the user until entering zero. The program uses the previous class to calculate and print average of {positive, negative} numbers.
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