View Compilation Error

0_0_38052424_17472.cpp: In function 'int main(int, char**)':
0_0_38052424_17472.cpp:7:37: error: 'strcmp' was not declared in this scope
         if (!strcmp(str,"ENDOFINPUT"))break;
                                     ^
0_0_38052424_17472.cpp:11:30: error: 'isalpha' was not declared in this scope
             if(isalpha(str[i]))str[i] = ((str[i]-'A') + 26 - 5) %26 + 'A';
                              ^