View Compilation Error

0_0_18028868_14677.cpp: In function 'void reset(int)':
0_0_18028868_14677.cpp:66:31: error: 'memset' was not declared in this scope
     memset(move,0,sizeof(move));
                               ^
0_0_18028868_14677.cpp: In function 'int main()':
0_0_18028868_14677.cpp:167:33: error: 'memset' was not declared in this scope
         memset(cnt,0,sizeof(cnt));
                                 ^