Write a C program. The program allows the user to input as many doubles with a non-number to exit the loop. The program's job is then to ouput the harmonic mean of the positive doubles in the list. No arrays are used in this program. An example of what the program should do is

if the list of doubles included {2.0, 3.0, 5.0, 7.0}

then the program should calculate 4/(1/2.0 + 1/3.0 + 1/5.0 + 1/7.0) and output it onto the screen

where 4 is the number of positive doubles and it is being divided by the sum of reciprocals of positive doubles in the list

Another example: Harmonic mean of {7, 7, 7, 7} is 7

All help is appreciated