View Compilation Error

0_0_39417700_5307.cpp: In function 'void init()':
0_0_39417700_5307.cpp:30:16: error: 'udfn' was not declared in this scope; did you mean 'dfn'?
   30 |         memset(udfn,0,sizeof(udfn));
      |                ^~~~
      |                dfn