Compilare: user.cpp: In function ‘void Remove(int)’: user.cpp:46:9: warning: unused variable ‘secondIndex’ [-Wunused-variable] int secondIndex; ^ user.cpp:48:9: warning: unused variable ‘vecSize’ [-Wunused-variable] int vecSize = nrInstances[num].insts.size(); ^ user.cpp: In function ‘void AddNum(int)’: user.cpp:69:9: warning: unused variable ‘secondIndex’ [-Wunused-variable] int secondIndex; ^ user.cpp: In function ‘void Read()’: user.cpp:180:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &m); ^ user.cpp:186:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &op, &num); ^