calling computeach students

This is a discussion on calling computeach students within the C Programming forums, part of the General Programming Boards category; re 425 project program 5 #include <stdio.h> #include <conio.h> #include <string.h> #include <ctype.h> #include <stdlib.h> #include <time.h> #include <isam.h> #include ...

  1. #1
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    Angry calling computeach students

    re 425 project program 5

    #include <stdio.h>
    #include <conio.h>
    #include <string.h>
    #include <ctype.h>
    #include <stdlib.h>
    #include <time.h>
    #include <isam.h>
    #include <common.h>




    FILE *fp_stock_master;
    FILE *fp_out;

    int x=1;


    RECORD_DATA *stock_rec;

    int main()
    {


    if((fp_stock_master=fopen("A:STCKMAST.DAT","rb"))= =NULL)
    {
    printf("ERROR OPENING STOCK MASTER FILE\n");
    exit(1);
    }
    else
    printf("OPENING STOCK MASTER FILE\n");



    while (x==1 )
    {
    if(fread(stock_rec,sizeof(RECORD_DATA),1,fp_stock_ master)!=1)
    {
    if(feof(fp_stock_master))
    { printf("end of file");x=0;strcpy(stock_rec->desc,"\0");break;}
    else if(!feof(fp_stock_master)) /*else reading error*/
    {printf("\nERROR READING CUSTOMER MASTER FILE - PROGRAM TERMINATED");exit(1); }
    }

    if(x==1)

    printf("%6s %19s %02d %06ld %04d %06s %06.2f\n",stock_rec->key,stock_rec->desc,
    stock_rec->supp_code,stock_rec->free_stock,stock_rec->min_stock,
    stock_rec->movement_date,stock_rec->price);

    }

    fclose(fp_stock_master);
    return 1;
    }

    this is trying to read my master file and it just gives a value of null for the stock_rec->key

    i cant get a value for the part number at all and am having real problems with this program.

    can anyone help

    steve

  2. #2
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    'stock_rec' pointer is not initialized.

    allocate memory for one RECORD_DATA variable and assign the pointer to it's addres

  3. #3
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    i'm not sure what you mean really,
    the record data structure is defined in a header as -

    typedef struct
    {
    char key[7];
    char desc[20];
    short supp_code;
    long free_stock;
    short min_stock;
    char movement_date[7];
    float price;
    } RECORD_DATA;

    so when i run my prog, it reads all the data correctly, but gives a value of null for the key, i don't understand at all !!!!!!!

  4. #4
    Registered User breed's Avatar
    Join Date
    Oct 2001
    Posts
    91
    I'm a newbie myself so it might not be a good idea in taking this advice.
    but i thought i might attempt it cos I'm on the compy course aswell.
    Looking at you code the only thing i can see is the fread ()
    maybe you should try and use the at the address operator

    if(fread(&stock_rec,sizeof(RECORD_DATA),1,fp_stock _
    master)!=1)

    if it dose'nt work sos // if it does cool!
    Before you judge a man, walk a mile in his
    shoes. After that, who cares.. He's a mile away and you've got
    his shoes.
    ************William Connoly

  5. #5
    Registered User breed's Avatar
    Join Date
    Oct 2001
    Posts
    91
    I'm a newbie myself so it might not be a good idea in taking this advice.
    but i thought i might attempt it cos I'm on the compy course aswell.
    Looking at you code the only thing i can see is the fread ()
    maybe you should try and use the at the address operator

    if(fread(&stock_rec,sizeof(RECORD_DATA),1,fp_stock _
    master)!=1)

    if it dose'nt work sos // if it does cool!
    Before you judge a man, walk a mile in his
    shoes. After that, who cares.. He's a mile away and you've got
    his shoes.
    ************William Connoly

  6. #6
    Registered User
    Join Date
    Aug 2001
    Posts
    247

    the more the merrier

    Hey, welcome to all, we are not alone!!!

    maybe the webmaster should think on setting up a "compubunglers" forum, so we could all gripe together lol.

    or set up an e-mail group.

    Code:
    char name[MAX];
    int computeach_students = 0;
    
    puts("If computeach student - Enter name");
    gets(name);
    computeach_student++;
    
    puts("Happy with there service")
    if((toupper(getch())) == 'N')
       computeach_student--;
    hoping to be certified (programming in c)
    here's the news - I'm officially certified.

  7. #7
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    "Hey, welcome to all, we are not alone!!!

    maybe the webmaster should think on setting up a "compubunglers" forum, so we could all gripe together lol.

    or set up an e-mail group. "


    Hey, try www.computeachstudents.ukf.net

  8. #8
    My diaper's full....... stevey's Avatar
    Join Date
    Nov 2001
    Posts
    759
    all problems solved on the why does it crash thread, thanx

    i shouldn't have started a new thread really

    hey dont try with the "&" that crashes the OS !!!!!!!!!!!!!!

    good look to all COMPY people , we need it !!!!!!!!!!!!!1

    steve
    Steve

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