View Compilation Error

0_0_28781572_24660.cpp: In function 'int main()':
0_0_28781572_24660.cpp:42:27: error: 'strlen' was not declared in this scope
         insert(s, strlen(s));
                           ^
0_0_28781572_24660.cpp:45:33: error: 'strlen' was not declared in this scope
         cout << find(s, strlen(s)) << endl;
                                 ^