View Compilation Error

0_0_17235619_18651.cpp: In function 'int main()':
0_0_17235619_18651.cpp:14:45: error: 'strcmp' was not declared in this scope
  while (cin >> str&&strcmp(str, "ENDOFINPUT")) {
                                             ^
0_0_17235619_18651.cpp:16:33: error: 'strlen' was not declared in this scope
    for (int i = 0;i < strlen(str);++i) {
                                 ^