C++ Program using the while loop

Write a program that will read an unknown number of positive or negative numbers from the keyboard and output even if the number is even or odd if it is odd. The user will enter a zero when there are no more numbers to input. The program should display the total number of even numbers, the total number of odd numbers and the average number in the end. If the user didnt enter any positive or negative numbers (she entered a zero for the first input), show No numbers were checked.