View Compilation Error

0_0_28564774_21047.cpp: In function 'int main()':
0_0_28564774_21047.cpp:172:30: error: 'strcmp' was not declared in this scope
     if (strcmp(str, "</html>") != 0)
                              ^
0_0_28564774_21047.cpp:202:28: error: 'strcmp' was not declared in this scope
   if (strcmp(str, "</html>") == 0)
                            ^