View Compilation Error

1_781_4748_4431.cpp:2:7: error: 'list' does not name a type
 const list[][31]=
       ^
1_781_4748_4431.cpp: In member function 'void Law_of_Commutation::work()':
1_781_4748_4431.cpp:61:27: error: 'List' was not declared in this scope
             printf("%d\n",List[N][A]);
                           ^