cout<<"You drive the knife deep into the zombie's temple and watch it fall to"<<endl;
cout<<"the ground! Do you wish to retrieve your knife from the zombie's skull?"<<endl;
cout<<"You retrieve your knife."<<endl;
else if (knifechoice==no)
cout<<"That's pretty gross, I'll just leave it there."<<endl;
cout<<"Yes or no please."<<endl;
THe rest of the program works, but it says in this section that the answers (yes and no) are undefined. Am I using cin incorrectly, or are yes and no some kind of c++ function that I just don't know about?