vc++编译link的问题

[newsxj]

各位好：
我是VC++6的新手，在编译link时出现以下问题，寻求帮助。Linking...
LIBCD.lib(crt0.obj) : error LNK2001: unresolved external symbol _main
Debug/demo2_3.exe : fatal error LNK1120: 1 unresolved externals

[loopyifly]

Linker Tools Error LNK2001
unresolved external symbol "symbol"

Code will generate this error message if it references something (like a function, variable, or label) that the linker can’t find in all the libraries and object files it searches. In general, there are two reasons this error occurs: what the code asks for doesn’t exist (the symbol is spelled incorrectly or uses the wrong case, for example), or the code asks for the wrong thing (you are using mixed versions of the libraries?some from one version of the product, others from another version).

Numerous kinds of coding and build errors can cause LNK2001. Several specific causes are listed below, and some have links to more detailed explanations.

[loopyifly]

更详细内容参见msdn

[EricHxy]

找不到main函数

[EricHxy]

如果是Dos程序，应该要有main函数作为EXE文件的入口点。
如果是Win程序，应该要有Winmain作为入口点。