Owl Get a Life

Compile Error

/usr/bin/ld: /tmp/ccUDhQ2E.o: in function `xythesnake(int, std::vector<int, std::allocator<int> >)':
xyfriend.cpp:(.text+0x0): multiple definition of `xythesnake(int, std::vector<int, std::allocator<int> >)'; /tmp/ccJIY2fE.o:xingyang.cpp:(.text+0x0): first defined here
/usr/bin/ld: /tmp/ccBWPQRE.o: in function `main':
grader.cpp:(.text.startup+0x128): undefined reference to `friendofxy(int, long long)'
collect2: error: ld returned 1 exit status