Compilare: user.cpp: In function ‘void sterge(int)’: user.cpp:51:18: warning: unused variable ‘ok’ [-Wunused-variable] int m=x%M, ok=0; ^ user.cpp: In function ‘int main()’: user.cpp:80:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.in","r",stdin); ^ user.cpp:81:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.out","w",stdout); ^ user.cpp:83:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:86:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &a, &b); ^ user.cpp: In function ‘void sterge(int)’: user.cpp:58:58: warning: ‘q’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(x == p->val){ if(p->n)q->n=p->n;else q->n=NULL;break;} ^