~/Desktop$ g++ vd.cpp -o vd
vd.cpp: In constructor ‘Gach::Gach(char*, char*, int, int, int, float)’:
vd.cpp:36: error: ‘strdup’ was not declared in this scope
vd.cpp: In copy constructor ‘Gach::Gach(const Gach&)’:
vd.cpp:44: error: ‘strdup’ was not declared in this scope
vd.cpp: In function ‘int main()’:
vd.cpp:126: error: ‘strcmp’ was not declared in this scope

Line 2: error: '$' in identifier or number
Line 2: error: stray '\342' in program
compilation terminated due to -Wfatal-errors.