Compilare: user.cpp: In function ‘void qsort(int, int)’: user.cpp:18:35: warning: operation on ‘v[j]’ may be undefined [-Wsequence-point] v[i]+=v[j]-(v[j]=v[i]); ^ user.cpp:19:51: warning: operation on ‘poz[j]’ may be undefined [-Wsequence-point] poz[i]+=poz[j]-(poz[j]=poz[i]),i++,j--; ^ user.cpp: In function ‘int main()’: user.cpp:40:75: warning: operation on ‘poz[poz[i]]’ may be undefined [-Wsequence-point] rez[poz[i]]=i,s++,poz[i]+=poz[poz[i]]-(poz[poz[i]]=poz[i]); ^ user.cpp:29:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("egipt.in","r",stdin); ^ user.cpp:30:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("egipt.out","w",stdout); ^ user.cpp:31:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:34:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]),poz[i]=i; ^