Compilare: user.cpp: In function ‘int findfirst(char, int)’: user.cpp:14:8: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int i,ok; ^ user.cpp: In function ‘void go_next(int&)’: user.cpp:37:6: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int ok; ^ user.cpp: In function ‘int main()’: user.cpp:47:8: warning: unused variable ‘ok’ [-Wunused-variable] int i,ok; ^ user.cpp:48:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("convertor.in","r",stdin); ^ user.cpp:49:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("convertor.out","w",stdout); ^