Compilare: user.cpp: In function ‘int main()’: user.cpp:59:21: warning: format ‘%lf’ expects argument of type ‘double’, but argument 2 has type ‘int’ [-Wformat=] printf("%lf\n",0); ^ user.cpp:56:11: warning: unused variable ‘x’ [-Wunused-variable] int n,x,y,i,j,d; ^ user.cpp:56:13: warning: unused variable ‘y’ [-Wunused-variable] int n,x,y,i,j,d; ^ user.cpp:57:12: warning: unused variable ‘s’ [-Wunused-variable] double s=0; ^ user.cpp:53:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("desen.in","r",stdin); ^ user.cpp:54:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("desen.out","w",stdout); ^ user.cpp:58:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&v[1].x,&v[1].y); ^ user.cpp:62:38: 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); ^