opencv编译时error LNK2019

已启动生成: 项目: opencvstudy_codetest, 配置: Debug x64 ------
1>MSVCRTD.lib(exe_main.obj) : error LNK2019: unresolved external symbol main referenced in function "int __cdecl invoke_main(void)" (?invoke_main@@YAHXZ)
1>C:\Users\hp\documents\visual studio 2015\Projects\opencvstudy_codetest\x64\Debug\opencvstudy_codetest.exe : fatal error LNK1120: 1 unresolved externals
========== 生成: 成功 0 个,失败 1 个,最新 0 个,跳过 0 个 ==========
这是什问题怎么解决?

你的工程是否正确。main函数没找到

http://blog.csdn.net/u011636160/article/details/51702368