Compilare: user.cpp: In function ‘int main()’: user.cpp:27:9: warning: unused variable ‘cate’ [-Wunused-variable] int n,i,cate=0,pp=0,st,dr,mij,fx,fy; ^ user.cpp:27:16: warning: unused variable ‘pp’ [-Wunused-variable] int n,i,cate=0,pp=0,st,dr,mij,fx,fy; ^ user.cpp:27:21: warning: unused variable ‘st’ [-Wunused-variable] int n,i,cate=0,pp=0,st,dr,mij,fx,fy; ^ user.cpp:27:24: warning: unused variable ‘dr’ [-Wunused-variable] int n,i,cate=0,pp=0,st,dr,mij,fx,fy; ^ user.cpp:27:27: warning: unused variable ‘mij’ [-Wunused-variable] int n,i,cate=0,pp=0,st,dr,mij,fx,fy; ^ user.cpp:24:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("pachete.in","r",stdin); ^ user.cpp:25:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("pachete.out","w",stdout); ^ user.cpp:29:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d",&n); ^ user.cpp:31:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d",&fx,&fy); ^ user.cpp:34:35: 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); ^