Get values from an audio file

I'm trying to use a c ++ library to detect frequencies of a sound. To use it I need to pass a double type vector with the audio samples. I managed to get a vector but for this I had to use android so he pick up audio from the microphone read in a double and write that vector in an archxt. I already have the file in .wav format. How do I get this audio file, filling a double vector so I can go to the function that does the detection of the audio frequencies without using android, with c ++ itself or even some program that does this?