Re: [Dev-C++] Arrays

[lstar36 <ls...@fl...>]

Your problem is that you need to read a file whic has the data in it. You
can either write the array to a file or use your editor to generate a txt
file with the dat in it. Then read in the data. I have modified your program
to show you the last. You try to do the first.

----- Original Message -----
From: "Saundra Schwarz" <Sch...@ho...>
To: <dev...@li...>
Sent: Sunday, November 19, 2000 9:25 PM
Subject: Re: [Dev-C++] Arrays


> The problem is I have no idea where to start.....
>
> The assignment is a generic one in which the professor just has us playing
> around with arrays to get used to using them....What is being asked of me
is
> to change the initialization statement in this program to have the array
> initialized by the file....but I don't know where to begin....
>
>
> #include <stdio.h>
> #include <stdlib.h>
>
>
> void PrintArray(int[], int);
> int SumArray(int[], int);
> int DeleteElement(int[], int, int);
> int InsertIndex(int[], int, int, int);
>
>
> int main()
> {
>  //      int a[20] = {14,17,23,26,33,38,39,41,52,56,0,0,0,0,0,0,0,0,0,0};
>        int    a(24);
>        FILE    *in;
>        int    i, sum;
>
>
  >      NumEls = 10,
>       DeleteIndex,
>       InsertIndex,
>      x;
>
>      if (in = fopen ("Myfile.txt", "rt")) == NULL)
>    {
>        FPRINT(STDERR, "CANNOT OPEN INPUT FILE.\N")
>        exit(1);
>    }
>        i=0;
>      DO
>      {
>            a[i] = FGETC(in);
>        }WHILE(a(i++) != EOF || i <20);
>
 >    printf("Array at start of program:\n\n");
>       PrintArray(a, NumEls);
>       printf("\n\n");
>
>       printf("The sum of these elements is %d.\n", SumArray(a, NumEls));
>
>       DeleteIndex = 5;
>
>       printf("After deletion of %d:\n", a[DeleteIndex]);
>
>       NumEls = DeleteElement(a, NumEls, DeleteIndex);
>
>       PrintArray(a, NumEls);
>       printf("\n\n");
>
>
>       printf("Enter a value to insert:  ");
>       scanf("%d", &x);
>       printf("\n\n");
>
>       InsertIndex = 6;
>
>       NumEls = InsertElement(a, NumEls, InsertIndex, x);
>
>       PrintArray(a, NumEls);
>
>       system("PAUSE");
>       return 0;
> }
>
>
>
>
> void PrintArray(int b[], int NumEls)
> {
>  int i;
>
>  i = 9;
>  printf("The element at index %d is %d.\n\n", i, b[i]);
>
>  printf("Array A has %d elements: ", NumEls);
>
>  for (i = 0; i < NumEls; i++)
>      printf("%3d", b[i]);
>
>  printf("\n");
> }
>
>
>
> int SumArray(int b[], int NumEls)
> {
>
>   int sum = 0;
>   int count = 0;
>
>   for(count = 0; count < NumEls; count++)
>    {
>        sum += b[count];
>
>     }//end for statemnt
>
>   return sum;
>
> }
>
>
>
> int DeleteElement(int b[], int NumEls, int DeleteIndex)
> {
>    int count;
>
>    for(count = DeleteIndex; count < NumEls; count++)
>     {
>
>       b[count] = b[count + 1];
>
>     }//end of for statement
>
>    NumEls--;
>
>    return NumEls;
> }
>
> int InsertElement(int b[], int NumEls, int InsertIndex, int x)
> {
>   int count;
>
>   for(count = NumEls + 1; count > InsertIndex; count--)
>   {
>
>    b[count] = b[count - 1];
>
>   }
>
>
>   b[InsertIndex] = x;
>
>   NumEls++;
>
>   return NumEls;
> }
>
>
> ----- Original Message -----
> From: Chad Simmons <ho...@ho...>
> To: <dev...@li...>
> Sent: Sunday, November 19, 2000 3:55 PM
> Subject: Re: [Dev-C++] Arrays
>
>
> > >From: "Saundra Schwarz" <Sch...@ho...>
> > >Reply-To: dev...@li...
> > >To: <dev...@li...>
> > >Subject: [Dev-C++] Arrays
> > >Date: Sun, 19 Nov 2000 18:47:00 -0800
> > >
> > >I have an assignment for school that is asking me to include a
procedure
> > >that reads 10 values from a text file to initialize an array.  The
> > >professor hasn't covered this  aspect of arrays yet and I'm not finding
> the
> > >info in the text....I'm looking for general how to's....thanks.
> > >
> > >Sam
> >
> > Well, there's two main components to this problem. The first is reading
> > numbers from a file. The second is assigning those numbers into an
array.
> > Which part is giving you trouble? (or is it both) Perhaps if you could
> show
> > how far you've gotten so far we may be able to give you some pointers as
> to
> > where to go next.
> >
> > Chad Simmons
> >
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