#pragma warning(disable:4996)

VS使用中常常会遇到一些过时或者不安全的函数，编译会报错：

　　错误 C4996 'sscanf': This function or variable may be unsafe. Consider using sscanf_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. ConsoleApplication1...........

用#pragma预处理命令禁止此类警告