C程序调试出现问题
调试出现:Linking...
44.obj : error LNK2001: unresolved external symbol "struct telephone __cdecl message(void)" (?message@@YA?AUtelephone@@XZ)
Debug/44.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.
是怎么回事?