The error is following. can anyone help me solve it?
I ve already put my DAC_shield folder in my Documents/Arduino/libraries. And all the ports are good. And I can run my code on my friends' computer.
"Arduino: 1.6.7 (Windows 7), Board: "Arduino Due (Programming Port)"
libraries\DAC_shield\DAC_shield.cpp.o: In function `DAC_shield::set(unsigned char, unsigned char)':
C:\Users\y\Documents\Arduino\libraries\DAC_shield/DAC_shield.cpp:23: multiple definition of `DAC_shield::set(unsigned char, unsigned char)'
sketch\DAC_shield.cpp.o:sketch/DAC_shield.cpp:23: first defined here
libraries\DAC_shield\DAC_shield.cpp.o: In function `DAC_shield::prep()':
C:\Users\y\Documents\Arduino\libraries\DAC_shield/DAC_shield.cpp:8: multiple definition of `DAC_shield::prep()'
sketch\DAC_shield.cpp.o:sketch/DAC_shield.cpp:8: first defined here
collect2.exe: error: ld returned 1 exit status
Multiple libraries were found for "DAC_shield.h"
Not used: C:\Program Files\Arduino\libraries\DAC_shield
exit status 1