Thread: Two Dimensional Array Input from Formatted Data

Hello, all. I was assigned a new program to sort a list of stocks from a formatted data file. The data file (truncated) is as follows:

Code:

BBY 48.75 48.65 49.30 49.35 48.10 48.35

COP 69.05 68.36 67.35 67.10 67.75 68.10

DEL 23.05 23.10 23.20 23.19 23.31 23.31

HPQ 40.12 40.24 40.50 41.00 41.10 41.68

HD  37.12 36.65 37.38 37.63 37.90 38.00

There are about 15 stocks in the list. The first column is the stock symbol, the second column is the average price, and the next five columns are daily prices. I am trying to read the stock symbols into a two dimensional array so that I can sort it by average prices later. My problem is with actually reading the correct stock symbol into the array. Here is the code:

Code:

#include <stdlib.h>

#include <stdio.h>

#define  MAX  20

#define  MAX_NAME  3

#define  MAX_DAYS  5

#define  FILENAME  "Stocks07.dta"

#define  EOS  '\0'


int main (void)

{

  FILE *ifp;

  char symbol[MAX][MAX_NAME];

  double prev_avg[MAX],

         daily[MAX][MAX_DAYS];

  int cnt,           // number of rows OR number of stocks

      element;       // counter for storing stock symbols and daily prices


  if((ifp = fopen(FILENAME, "r")) != NULL)

  {

     for (cnt = 0; cnt < MAX; ++cnt)

     {

        for(element = 0; element < MAX_NAME; ++element)

            fscanf(ifp,"%c", &symbol[cnt][element]);

        symbol[cnt][element] = EOS;

        fscanf(ifp,"%lf", &prev_avg[cnt]);

        for(element = 0; element < MAX_DAYS; ++element)

            fscanf(ifp,"%lf", &daily[cnt][element]);

        fscanf(ifp,"%*c");

     }

     printf("The first symbol is %s", symbol[0]);

     printf("\n\nPrev. avg is %5.2f", prev_avg[0]);

     printf("\n\nWednesday's price for %s is %5.2f", symbol[4], daily[4][2]);

     printf("\n\n15th Prev.avg is %5.2f\n\n", prev_avg[14]);

     system("pause");

  }

  else

     printf("\n\n\n\n %45s \n\n\n", "Missing Data File!");

  return 0;

}

From the sample printf statements, my output is as follows:

Code:

The first symbol is BBYCOPDELHPQHD IBMINTLMTLOWLUFPEPPPCTINWMTXOM

Prev. avg is 48.75

Wednesday's price for HD IBMINTLMTLOWLUFPEPPPCTINWMTXOM is 37.63

15th prev. avg is 76.12

Can anyone tell me what I'm doing wrong or another method that doesn't involve using a lot of standard functions. We were told to use the methods we learned in class.

But if I set MAX_NAME to 2, won't it only get the first 2 letters and then the EOS? I tried removing the EOS line but I got the same thing + gibberish.

YES! Thank you both so much. Quickest and most accurate responses I could have asked for.

Actually, just one more question. I've used a for() loop to control how many stocks there are. This always ends up being 20. The problem is, how can I test for EOF without messing up my read statements?