Compilare: user.cpp: In function ‘int main()’: user.cpp:16:20: warning: unused variable ‘k’ [-Wunused-variable] int c,n,i,nr,j,k,z; ^ user.cpp:16:22: warning: unused variable ‘z’ [-Wunused-variable] int c,n,i,nr,j,k,z; ^ user.cpp:17:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rafturi.in","r",stdin); ^ user.cpp:18:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rafturi.out","w",stdout); ^ user.cpp:19:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&c,&n); ^ user.cpp:21:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&r[i].x,&r[i].y); ^