Compilare: user.cpp: In function ‘int main()’: user.cpp:81:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("barbar.out","w",stdout); ^ user.cpp: In member function ‘char InParser::read_ch()’: user.cpp:20:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^ user.cpp: In function ‘int main()’: user.cpp:113:23: warning: ‘yo’ may be used uninitialized in this function [-Wmaybe-uninitialized] a[xo][yo]=d[xo][yo]; ^ user.cpp:113:23: warning: ‘xo’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:126:27: warning: ‘yd’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%lld",a[xd][yd]-1); ^ user.cpp:126:27: warning: ‘xd’ may be used uninitialized in this function [-Wmaybe-uninitialized]