Compilare: user.cpp: In function ‘int main()’: user.cpp:33:40: warning: operation on ‘cate’ may be undefined [-Wsequence-point] if(!v[i]) x[++cate]=x[cate-1]+1; ^ user.cpp:35:28: warning: operation on ‘cate’ may be undefined [-Wsequence-point] x[++cate]=x[cate-1]; ^ user.cpp: In function ‘void citeste(int&)’: user.cpp:15:45: 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,DIM,stdin),poz=0; ^ user.cpp:20:45: 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,DIM,stdin),poz=0; ^ user.cpp: In function ‘int main()’: user.cpp:25:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("densitate.in","r",stdin); ^ user.cpp:26:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("densitate.out","w",stdout); ^