Compilare: user.cpp: In function ‘bool cmp(long int, long int)’: user.cpp:66:29: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] for(i=0; *(long*)&s[x][i] == *(long *)&s[y][i];i+=2) ; ^ user.cpp:66:50: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] for(i=0; *(long*)&s[x][i] == *(long *)&s[y][i];i+=2) ; ^ user.cpp:67:27: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] return *(long*)&s[x][i] < *(long*)&s[y][i]; ^ user.cpp:67:46: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] return *(long*)&s[x][i] < *(long*)&s[y][i]; ^ user.cpp: In function ‘long int readS(long int)’: user.cpp:25:39: 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,maxBuf,stdin); ^ user.cpp:33:39: 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,maxBuf,stdin); ^ user.cpp: In function ‘long int readN()’: 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(Buff,1,maxBuf,stdin); ^ user.cpp:56:39: 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,maxBuf,stdin); ^ user.cpp: In function ‘int main()’: user.cpp:79:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dictree.in","r",stdin); ^ user.cpp:80:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dictree.out","w",stdout); ^ user.cpp:82:31: 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,maxBuf,stdin); ^