View Compilation Error

0_0_37506002_7564.cpp: In function 'void insert(int)':
0_0_37506002_7564.cpp:15:28: error: 'strlen' was not declared in this scope
     int len=(int)strlen(str);
                            ^
0_0_37506002_7564.cpp: In function 'void buildAC()':
0_0_37506002_7564.cpp:26:5: error: 'queue' was not declared in this scope
     queue<int> q;
     ^
0_0_37506002_7564.cpp:26:11: error: expected primary-expression before 'int'
     queue<int> q;
           ^
0_0_37506002_7564.cpp:29:9: error: 'q' was not declared in this scope
         q.push(Trie[0][i]);
         ^
0_0_37506002_7564.cpp:31:12: error: 'q' was not declared in this scope
     while(!q.empty()){
            ^
0_0_37506002_7564.cpp: In function 'void Query()':
0_0_37506002_7564.cpp:44:28: error: 'strlen' was not declared in this scope
     int len=(int)strlen(str);
                            ^