keil 5编译代码显示错误怎么解决？

linking...
..OutputFWLIB.axf: Error: L6218E: Undefined symbol assert_param (referred from misc.o).
Not enough information to list image symbols.
Not enough information to list load addresses in the image map.
Finished: 2 information 0 warning and 1 error messages.
"..OutputFWLIB.axf" - 1 Error(s) 0 Warning(s).
Target not created.
Build Time Elapsed: 00:00:01

视频讲解的添加的。c和。h文件