Compilare: user.cpp: In function ‘bool sortare(aa, aa)’: user.cpp:7:21: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] {if(a.x<b.x||a.x==b.x&a.y<b.y) ^ user.cpp: In function ‘int main()’: user.cpp:13:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] {freopen ("cuburi3.in","r",stdin); ^ user.cpp:14:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("cuburi3.out","w",stdout); ^ user.cpp:16:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:18:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] {scanf("%d%d",&v[i].x,&v[i].y); ^ user.cpp:55:1: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(i=1;i<=k;i++) ^