Add all necessary error checking to the programs in this section, including testing the return value from fprintf. In the waveform generation code of any of the tuning fork programs, change the call...

Add all necessary error checking to the programs in this section, including testing the return value from fprintf.

In the waveform generation code of any of the tuning fork programs, change the call to the sin function with a call to the cos function. View and audition the output in both text and binary forms.