View Compilation Error

0_0_24879559_4774.cpp: In function 'int main()':
0_0_24879559_4774.cpp:13:30: error: 'strcmp' was not declared in this scope
   if (strcmp(state, "Running") == 0)
                              ^
0_0_24879559_4774.cpp:23:24: error: 'strlen' was not declared in this scope
   else if (strlen(state) == 3)
                        ^