/usr/bin/ld: /tmp/ccek7xYb.o: in function `press(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)':
grader.cpp:(.text+0x0): multiple definition of `press(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)'; /tmp/ccWhfU28.o:combo.cpp:(.text+0xc0): first defined here
/usr/bin/ld: /tmp/ccek7xYb.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccWhfU28.o:combo.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status