Zombie program in C - Page 2

char pagain;
        int error = 1;
        while(error){
                printf("would you like to play again?: 1\\0\n");
           scanf("%c", &pagain);
               
           switch(pagain){
                   case '1':
                                printf("success!\n");
                                error = 0;
                                break;

                        case '0':
                                printf("Goodbye!\n");
                                exit(0);
                                break;
                                
                        default:
                                printf("please enter a valid key\n");
                }
        }

void zombieGame(){ 
        ... // your game here
}

int playAgainChecker(){  //alternative is use bool
        int checkVal = -1;
        while(1){ // if using bool use true here
                prinf("Would you like to play again? (Hit '1' for yes and '2' for no): ");
                scanf("%i", &checkVal);  //maybe it was %d
                flushall(); 
                printf("\n");
                checkVal--;
                
                if(checkVal < 0 || checkVal > 1){ 
                        printf("Sorry that was an invalid input\n");
                        // .. continue loop since invalid and should never leave until yes or no
                }else{
                        return !checkVal; // since checkVal-- before causes 1 to be no and 0 to be yes
                }
        }
}

int main(int argc, const char* argv[]){ // Hmmm... or is it void
        int cPlay  = 1;
        while(cPlay)
                zombieGame(); // zombie game is independant of the main function
                
                // once the zombie game is completed then check to play again
                cPlay = playAgainChecker();
        }       
        return 0;
}