VS2015 error c4996: 'fopen': This function or variable may be unsafe

问题：

      error C4996: 'fopen': This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
 

解决方法：

         项目 =》属性 =》c/c++  =》预处理器=》点击预处理器定义，编辑，加入_CRT_SECURE_NO_WARNINGS