Compilare: user.cpp: In member function ‘char InParsare::next_char()’: user.cpp:48:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,1,SIZE,stdin); ^ user.cpp: In function ‘int main()’: user.cpp:140:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("volum.out","w",stdout); ^ user.cpp: In constructor ‘InParsare::InParsare()’: user.cpp:56:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("volum.in","r",stdin); ^ user.cpp:58:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,1,SIZE,stdin); ^