Wysyłam prosty e-mail w C ++. Pobrałem przykładowy program C ++ z poniższego linku.http://cboard.cprogramming.com/cplusplus-programming/125655-sending-simple-email-cplusplus.html Przykładowy program wydaje się trafiać w następujący błąd podczas kompilacji. Pomóż mi z rozwiązaniem.

Error   8   error LNK2019: unresolved external symbol _send_mail referenced in function _wmain  

Error   9   error LNK2019: unresolved external symbol __imp__recv@16 referenced in function "int __cdecl connect_to_server(char const *)" (?connect_to_server@@YAHPBD@Z)    

Error   10  error LNK2019: unresolved external symbol __imp__connect@12 referenced in function "int __cdecl connect_to_server(char const *)" (?connect_to_server@@YAHPBD@Z) 

Error   11  error LNK2019: unresolved external symbol __imp__htons@4 referenced in function "int __cdecl connect_to_server(char const *)" (?connect_to_server@@YAHPBD@Z)    

Error   12  error LNK2019: unresolved external symbol __imp__socket@12 referenced in function "int __cdecl connect_to_server(char const *)" (?connect_to_server@@YAHPBD@Z)  

Error   13  error LNK2019: unresolved external symbol __imp__getprotobyname@4 referenced in function "int __cdecl connect_to_server(char const *)" (?connect_to_server@@YAHPBD@Z)   

Error   14  error LNK2019: unresolved external symbol __imp__gethostbyname@4 referenced in function "int __cdecl connect_to_server(char const *)" (?connect_to_server@@YAHPBD@Z)