Compilare: user.cpp: In function ‘void Scanf(int&)’: user.cpp:18:5: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] for(;'0'>buffer[pointer]||buffer[pointer]>'9';next); ^ user.cpp:19:5: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] for(;'0'<=buffer[pointer]&&buffer[pointer]<='9';next) ^ user.cpp: In function ‘int main()’: user.cpp:120:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kdtree.in","r",stdin); ^ user.cpp:121:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kdtree.out","w",stdout); ^