Compilare: user.cpp: In function ‘int main()’: user.cpp:11:17: warning: unused variable ‘p1’ [-Wunused-variable] long double p1=(long double)x; ^ user.cpp:12:17: warning: unused variable ‘p2’ [-Wunused-variable] long double p2=(long double)y; ^ user.cpp:8:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("taste.in","r",stdin); ^ user.cpp:9:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("taste.out","w",stdout); ^ user.cpp:10:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld %lld",&x,&y); ^