reverse the output from a pointer
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Thread: reverse the output from a pointer

  1. #1
    Join Date
    Jan 2012
    Posts
    5

    reverse the output from a pointer

    Write a C program to read the list from the file
    and store them in the arrays. Your program
    should write the list of client’s account
    number, client’s name and the client’s balance
    to another file called “newdata.txt” in reversed
    order and also display them on the screen.


    An example of output dialog is shown below
    Account Name Balance
    800 Stacy 100.10
    700 Michael 81.05
    600 Dale 1005.30
    500 Richard 214.89
    400 Stone -45.23
    300 White 0.00
    200 John 345.67
    100 Jones 24.50

    --------

    This is what I have done so far bellow here....But the only missing part is the reversed order of “newdata.txt”
    contents. Please help! Been trying now for few days with no succes. =(

    Regards,
    Mark

    #include <stdio.h>
    #include <string.h>
    #include <stdlib.h>

    int main()
    {
    FILE *ifpt,*ofpt;
    int i;
    double account;
    double balance;
    char name[25],s[60];

    if((ifpt=fopen("client.txt","r")) == NULL)
    {
    printf("ERROR : File could not be opened\n");
    exit(1);
    }
    if ((ofpt = fopen("newdata.txt", "w")) == NULL)
    {
    printf("ERROR : File could not be opened\n");
    exit(1);
    }
    else
    {
    printf ("\nAccount\tName\t\tBalance\n");
    fprintf (ofpt,"\nAccount\tName\t\tBalance\n");
    }
    for(i=0;i<8;i++)
    {
    fgets(s,59,ifpt);
    sscanf(s,"%lf %s %lf", &account,&name,&balance);
    sprintf(s,"%.2lf\t%s\t\t%0.2lf\n", account,name,balance);
    puts(s);
    fputs(s,ofpt);
    }
    fclose(ifpt);
    fclose(ofpt);

    getch();

    system("pause");
    return 0;
    }

  2. #2
    GCDEF is offline Elite Member Power Poster
    Join Date
    Nov 2003
    Posts
    12,057

    Re: reverse the output from a pointer

    You'll probably want a struct to store each client's information, and as the assignment say, and array to store it all.

    Also please read the Before You Post announcement about code tags.

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