Thread: Comparing 2 arrays

I am programming a deal or no deal game for class. I am stuck at the point after a person "opens" a case. I can get the program to display the proper case number and hidden value, I can also get the program to recognize that that particular case is gone, but not that prize.

For example, if the $500 prize is gone, the computer cannot list it. here are my functions.

The code to open a case

Code:

void open (int cases[], int arraylength){
  int i= 0;
  int sentinal=0;
  int j = 0;
  int k = 0;
  
  while(sentinal==0 ){
  printf("\nChoose a case 1-10\n");
  scanf("%d",&i);
  
  if(1>i || i>10){
    printf("Out of range, try again");
  }
    else{
    if(cases[i]==0){
    printf("Already opened, try again");
    }
      else{
      printf("Case %d had $%d\n", i, cases[i-1]);
      cases[i-1]=0;
      sentinal++;
      } 
    }
  }
}

the code to list remaining case numbers

Code:

void unopenedcases (int cases[], int arraylength){
  int sentinal = 0;
  int i = 0;
  printf ("\n");
    for (i=0; i<SIZE; i++){
      sentinal = 0;
	while (sentinal==0){
	  if (cases[i]!=0){
	  printf("%d ", i+1);
	  sentinal = 1;
	  }
	     else{
	     sentinal = 1;
	     }
       }
    }
  printf ("\n");
}

and the problem code, to display remaining prizes

Code:

void prizelook (int cases[], int prizes[], int arraylength){
  int i = 0;
  int j = 0;
  

  while(i<SIZE ){
    if (prizes [i] == cases [j]){
      printf ("$%d ", prizes[i]);
      i++;
      }
    else{
      j++;
    }
  }
   printf ("\n");
}

Any ideas?

Originally Posted by shel5210

Code:

  while(i<SIZE ){
    if (prizes [i] == cases [j]){
      printf ("$%d ", prizes[i]);
      i++;
      }
    else{
      j++;
    }
  }
}

What exactly are you doing here? You compare the value of prizes[0] to the value of cases[0], then if they match you print prizes[0] and increment its counter, then compare prizes[1] to cases[0] and then if they don't match, inc j and compare again so then its prizes[1] == cases[1]..

I don't see how that could be useful in any way? bit of an odd loop..Are you sure you didn't mean something like this:

Code:

while (i < SIZE)
    if (case[i]) /* case[i] does not equal zero */
        printf("$%d\n",prizes[i++]);