--------------------Configuration: hello - Win32 Debug--------------------
Linking...
LIBCD.lib(wincrt0.obj) : error LNK2001: unresolved external symbol _WinMain@16
Debug/hello.exe : fatal error LNK1120: 1 unresolved externals
执行 link.exe 时出错.
hello.exe - 1 error(s), 0 warning(s)
应该怎么办?