/*
PROJECT: C Premier Plus exercise 8 - 5
PURPOSE: "Modify the guessing program of Listing 8.4 so that it uses a more 
          intelligent guessing strategy. For example, Have the program 
          initially guess 50, and have it ask the use whether the guess is 
          high, low or correct. If, say, the guess is low, have the next guess 
          be half way between 50 and 100, that is, 75. If the guess is high, 
          let the next guess be half way between 75 and 50, and so on. Using 
          this Binary search strategy, the program quickly zeros in on the 
          correct answer, at least if the user does not cheat.
  DATES: 30 may '19, afternoon - 
*/
#include <stdio.h>
/*
    The program will ask the user if the want to play a game, if they accede 
offer the first guess and ask if it is correct
    IF The guess should go higher add a variable equal to a half of the guess 
and keep adding until the users says lower
    If the question should go lower Split the guess by a variable that starts 
at a half of the guess and keep halving until the user says higher
*/
int main (void)
{
    int Guess = 50, UpStep = 25, LoStep = 2;
    char Status, Answer = '\0', Step = '\0'; //I already tried not initializing
                                             //these variables but the same 
                                             //error keeps happening
    
    printf("Lets play a game, shall we?\n[Y]es?\n[N]o?\n");
    scanf("%c", &Status);
    
    if ((Status == 'N') || (Status == 'n'))    /*exit message*/
    {
        printf("\nOh well, see you then");
        return 0;
    }
    
    if ((Status == 'Y') || (Status == 'y')) /*begin of the game*/
    {
        printf("\nThink of a number from 1 to 100");
        printf("\nIs it %d ?", Guess);
        printf("\n[Y]es or [N]o?\n");
        scanf("%c", & Answer);//The program is going from this line to the 
                              //error message on line 81
        
        if ((Answer == 'Y') || (Answer == 'y')) /*congrats message*/
        {
            printf("\nGreat!");
            printf("\nWanna play again?");
            scanf("%d", &Status);
        }
        
        if ((Answer == 'N') || (Answer == 'n')) /*game loop*/
        {
            printf("\nShould it be [h]igher or [l]ower?");
            scanf("%c", & Step);
            
            if ((Step == 'H') || (Step == 'h')) /*Up Movement*/
            {
                Guess = Guess + UpStep;
                UpStep = UpStep + 1;
                LoStep = LoStep - 1;
            }
            
            if ((Step == 'L') || (Step == 'l')) /*Down movement*/
            {
                Guess = Guess / LoStep;
                LoStep = LoStep + 1;
                UpStep + UpStep / LoStep;
            }
            
            else /*error message*/
            {
                printf("\nThat's not an acceptable answer");
                printf("\nPlease use H or L");
                scanf("%c", & Step);
            }
            
            printf ("Is it %d ?");
            scanf("%c", & Answer);
        }
        
        else /*error message*/
        {
            printf("\nThat's not an acceptable answer");
            printf("\nPlease use Y or N");
            scanf("%c", & Answer);
        }
    }
    
    else /*error message*/
    {
        printf("\nThat's not an acceptable answer");
        printf("\nplease use 'y' or 'n'");
        scanf("%d", &Status);
    }
}