Is there a way to mix to files into one with RSox (or libsox)?

[hector]

Is there a way to mix two files into one with RSox (or libsox)?
With the command line would be just that:
sox -m input1.mp3 input2.mp3 output.mp3

[marbemac]

+1, is this possible?

[xuandu]

hello. ,how to use sox.h ,the c++/c code to do mix; not command line