C-Programming Cont-II

Hey guyz,

I am just having few problems with the program again. This is a followup from the previous post titled: "C Programming Project Cont.."

Just in case, i am going to post u the question or the task.

Hey guyz,

I got a c programming project due in the next 2 days.. and i am stuck.....

Here is the project:

Write a program that will simulate a slot machine.
The program should start by presenting the user with a menu: 2 dollars for regular prizes or 4 dollars for increased prize values or 0 to stop. Make sure you validate user’s input.

The program then should generate randomly three values. The program should display to the user the combination.

The lucky combinations are:
First prize – 3 cherries
Second prize – 3 apples
Third prize – 3 bananas

If the user played only 2 dollars, for all lucky combinations offer as a prize a regular prize of 50 dollars.
If the user played 4 dollars, offer as first prize 500 dollars, second prize 250, third prize 100 dollars.

For an unlucky combination offer 0 dollars.

The program should continue the execution until the user chooses to quit.
Before quitting the program should display to the user the amount of money the user spent and won during the game.


[ok. these are the functions that i am supposed to implement in the project]

int generateNum (void);//generates and returns a random int
void displayCombination (int slot);//displays bananas    
                                 // apples or cherries
int checkCombination(int slot1, int slot2, int slot3);//checks if combination is lucky and returns
                         // corresponding prize
int displayPrize(int prize, int change);//displays the
//amount won (including zero) and returns //amount won


Here is how a sample RUN looks like:

Sample run:
Welcome to my casino where everyone is a winner!

Enter change:
$2 for regular prize or
$4 for increased prize value or
$0 to quit => 44

Enter change:
$2 for regular prize or
$4 for increased prize value or
$0 to quit => 4

     ----------------------
     |CHERRY|BANANA|BANANA|
     ----------------------

NOT LUCKY! You get $0

Enter change:
$2 for regular prize or
$4 for increased prize value or
$0 to quit =>2

     ----------------------
     |APPLE| APPLE | APPLE |
     ----------------------
CONGRATULATIONS! You get $50

Enter change:
$2 for regular prize or
$4 for increased prize value or
$0 to quit =>0

You spent 6 dollars and won 50 dollars!
Good bye………
-----------------------------------------------------------------------------------------

Ok. HEre is my solution to the problem above:


#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
#include<time.h>
int generateNum(void);
void displayCombination1 (int slot1);
void displayCombination2 (int slot2);
void displayCombination3 (int slot3);
int checkCombination(int slot1, int slot2, int slot3);
int displayPrize(int prize, int change);
static int s1, s2, s3, chhange,amount=0;
static int prizeval;
main()
{
   //clrscr();
      int change;
      srand(time (NULL));
      printf("\n");
      printf("\n*************************");
      printf("\n  WELCOME TO MY CASINO " );
      printf("\n*************************");
      printf("\n");
      printf("\n");
      printf("\n");
      do {
            do {
                  printf("\nENTER $ CHANGE $ \n");
                  printf("\n");
                  printf("$2 for regular prize or \n");
                  printf("$4 for increased prized value or \n");
                  printf("$0 to quit => ");
                  scanf("%d", &change);
                  printf("\n");
                  chhange = change;
            } while(change !=2 && change !=4 && change !=0);  //checks the validity of input from user
            if(change==0) {
                  printf("You spent $ %d and won $ %d", amount, prizeval);
                  getch();
                  return 0;

            }
     
            s1 = generateNum();
            displayCombination1 (s1);
            s2 = generateNum();
            displayCombination2 (s2);
            s3 = generateNum();
            displayCombination3 (s3);   // displayCombination function
            checkCombination(s1,s2,s3); // checkCombination function
            printf("\n");
      } while(change !=0);
   


}
int generateNum(void) //generates random numbers from 1-3
{
      int num;
      num = 1+rand()%3;
      return (num);
}
void displayCombination1 (int slot1)
{
      switch(slot1)   {
            case 1:
                  printf("<Apples--");
                  break;
            case 2:
                  printf("<Bananas--");
                  break;
            case 3:
                  printf("<cherries--");
                  break;
      }
}
void displayCombination2 (int slot2)
{
      switch(slot2)   {
            case 1:
                  printf("Apples--");
                  break;
            case 2:
                  printf("Bananas--");
                  break;
            case 3:
                  printf("cherries--");
                  break;
      }
}
void displayCombination3 (int slot3)
{
      switch(slot3)   {
            case 1:
                  printf("Apples> ");
                  break;
            case 2:
                  printf("Bananas> ");
                  break;
            case 3:
                  printf("cherries> ");
                  break;
      }
}


int checkCombination(int slot1, int slot2, int slot3)
{
      prizeval =0;
      if((slot1==slot2) && (slot2==slot3))       //checks the equality of slot #s
            prizeval+= displayPrize(slot1,chhange);  // adds the prizeval everytime the if becomes True
      else
            printf("Not so lucky! You win $0 \n");
      amount += chhange;
      return ((slot1==slot2) && (slot2==slot3));  // returns true or false (1 or 0)
}


int displayPrize (int prize, int change)    //Displays the prize won
{
      if (change ==2)
            printf("\nCongratulations! You have won $50");
      else
            switch (s1) {
                  case 1:
                        printf("\n\nCongratulations! You have won $500");
                        return 500;
                        break;
                  case 2:
                        printf("\n\nCongratulations! You have won $250");
                        return 250;
                        break;
                  case 3:
                        printf("\n\nCongratulations! You have won $100");
                        return 100;
                        break;
            }
}

------------------------------------------------------------------------------------------------------------

I am having problems with:  "prizeval" in checkcombination function.

In main function, i would have to calculate the total amount of money spent, and the total amount of money won.

"prizeval" calculates the total amount of money won..

But, the problem is prizeval is displaying the correct value one time,  and other times it is displaying the wrong value, like -1, 34..

Sometimes, its going back and forth. Correct value one time and wrong value other times...

Some random number.., dont know where it is getting from..

I tried to fix it..by declaring it different places etc.. but, it doesnt seem to be working.,,

Can u guyz..help me out here...?

Thanks.