Compilare: user.cpp: In function ‘int main()’: user.cpp:46:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dreptunghiuri2.in","r",stdin); ^ user.cpp:47:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dreptunghiuri2.out","w",stdout); ^ user.cpp:49:38: 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 , Bsize , stdin); p = 0; ^ user.cpp: In function ‘int getNr()’: user.cpp:70:46: 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 , Bsize , stdin); ^ user.cpp:81:46: 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 , Bsize , stdin); ^ user.cpp: In function ‘void browse(int, int, int, int, int)’: user.cpp:40:61: warning: ‘yy’ may be used uninitialized in this function [-Wmaybe-uninitialized] browse(lvl + 1 , x + 1 , y + 1 , xx - 1 , yy - 1); ^ user.cpp:40:61: warning: ‘xx’ may be used uninitialized in this function [-Wmaybe-uninitialized]