/usr/bin/ld: /tmp/ccZW7Vfd.o: in function `append_print(int)':
grader.cpp:(.text+0x0): multiple definition of `append_print(int)'; /tmp/ccbz2kYe.o:registers.cpp:(.text+0x3b0): first defined here
/usr/bin/ld: /tmp/ccZW7Vfd.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccbz2kYe.o:registers.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccZW7Vfd.o: in function `append_store(int, std::vector<bool, std::allocator<bool> >)':
grader.cpp:(.text+0x2a0): multiple definition of `append_store(int, std::vector<bool, std::allocator<bool> >)'; /tmp/ccbz2kYe.o:registers.cpp:(.text+0x650): first defined here
/usr/bin/ld: /tmp/ccZW7Vfd.o: in function `append_not(int, int)':
grader.cpp:(.text+0x5c0): multiple definition of `append_not(int, int)'; /tmp/ccbz2kYe.o:registers.cpp:(.text+0x9f0): first defined here
/usr/bin/ld: /tmp/ccZW7Vfd.o: in function `append_move(int, int)':
grader.cpp:(.text+0x790): multiple definition of `append_move(int, int)'; /tmp/ccbz2kYe.o:registers.cpp:(.text+0xcd0): first defined here
/usr/bin/ld: /tmp/ccZW7Vfd.o: in function `append_or(int, int, int)':
grader.cpp:(.text+0x960): multiple definition of `append_or(int, int, int)'; /tmp/ccbz2kYe.o:registers.cpp:(.text+0xfb0): first defined here
/usr/bin/ld: /tmp/ccZW7Vfd.o: in function `append_add(int, int, int)':
grader.cpp:(.text+0xb60): multiple definition of `append_add(int, int, int)'; /tmp/ccbz2kYe.o:registers.cpp:(.text+0x12b0): first defined here
/usr/bin/ld: /tmp/ccZW7Vfd.o: in function `append_xor(int, int, int)':
grader.cpp:(.text+0xd60): multiple definition of `append_xor(int, int, int)'; /tmp/ccbz2kYe.o:registers.cpp:(.text+0x18b0): first defined here
/usr/bin/ld: /tmp/ccZW7Vfd.o: in function `append_and(int, int, int)':
grader.cpp:(.text+0xf60): multiple definition of `append_and(int, int, int)'; /tmp/ccbz2kYe.o:registers.cpp:(.text+0x15b0): first defined here
/usr/bin/ld: /tmp/ccZW7Vfd.o: in function `append_left(int, int, int)':
grader.cpp:(.text+0x1160): multiple definition of `append_left(int, int, int)'; /tmp/ccbz2kYe.o:registers.cpp:(.text+0x1bb0): first defined here
/usr/bin/ld: /tmp/ccZW7Vfd.o: in function `append_right(int, int, int)':
grader.cpp:(.text+0x1360): multiple definition of `append_right(int, int, int)'; /tmp/ccbz2kYe.o:registers.cpp:(.text+0x1eb0): first defined here
collect2: error: ld returned 1 exit status