Compilare: main.cpp: In function 'int main()': main.cpp:131:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("arbint.out", "w", stdout); ^ main.cpp: In member function 'char InParser::get_char()': main.cpp:20:58: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buffer, sizeof(buffer[0]), buff_size, infile); ^