Compilare: user.cpp: In function ‘void Desc(int, int)’: user.cpp:14:12: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] while(x&1==0) ^ user.cpp: In function ‘int main()’: user.cpp:47:15: warning: unused variable ‘x’ [-Wunused-variable] int n,i,j,x,nr,produs,stare; ^ user.cpp:49:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("pairs.in","r",stdin); ^ user.cpp:50:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("pairs.out","w",stdout); ^ user.cpp:51:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:54:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i]); ^