Compilare: user.cpp: In function ‘bool complement(int, int)’: user.cpp:38:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (a>0 && fst.length()<s) ^ user.cpp:43:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (fst.length()<s) fst+='0'; ^ user.cpp:44:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (b>0 && scd.length()<s) ^ user.cpp:50:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (scd.length()<s) ^ user.cpp: In function ‘void citeste(int&)’: user.cpp:25:56: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if (++poz==DIM) fread(buff,1,DIM,stdin),poz=0; ^ user.cpp:29:56: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if (++poz==DIM) fread(buff,1,DIM,stdin),poz=0; ^ user.cpp: In function ‘int main()’: user.cpp:60:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("panda.in","r",stdin); ^ user.cpp:61:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("panda.out","w",stdout); ^