View Compilation Error

0_0_14693645_11044.cpp: In constructor 'node::node()':
0_0_14693645_11044.cpp:15:28: error: 'memset' was not declared in this scope
   memset(ne,NULL,sizeof(ne));
                            ^
0_0_14693645_11044.cpp: In function 'int query(node*)':
0_0_14693645_11044.cpp:67:32: error: 'strlen' was not declared in this scope
  int i=0,ans=0,x,len=strlen(str);
                                ^