View Compilation Error

0_0_19746388_15900.cpp: In function 'void hanmi(int*, int&)':
0_0_19746388_15900.cpp:17:44: error: 'memset' was not declared in this scope
      memset(visited, false, sizeof(visited));
                                            ^
0_0_19746388_15900.cpp: In function 'int main()':
0_0_19746388_15900.cpp:84:39: error: 'memset' was not declared in this scope
           memset(mapp, 0, sizeof(mapp));
                                       ^