Naming files in c

This is a discussion on Naming files in c within the C Programming forums, part of the General Programming Boards category; Hi, I'm a student working on a project which requires me to create say 100 text files in C by ...

  1. #1
    Registered User sandeep080's Avatar
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    Question Naming files in c

    Hi,

    I'm a student working on a project which requires me to create say 100 text files in C by naming the files in the format name001.txt , name002.txt , ... so on till 100.
    I want a logic to do this in loops..

    else i'd have to code it this way:

    FILE* fp[100];

    fp[0]=fopen("name001.txt","w");
    fp[1]=fopen("name002.txt","w");
    fp[2]=fopen("name003.txt","w");
    .
    .
    .
    till hundred??

    pls help..

    thanks..

  2. #2
    Jack of many languages Dino's Avatar
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    Do you know how to code a loop?
    Mac and Windows cross platform programmer. Ruby lover.

    Quote of the Day
    12/20: Mario F.:I never was, am not, and never will be, one to shut up in the face of something I think is fundamentally wrong.

    Amen brother!

  3. #3
    Registered User sandeep080's Avatar
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    Unhappy @ dino

    ya i know to code a loop..
    i tried this code but its not working.. pls help..
    Code:
    //file name numbering program
    #include<stdio.h>
    #include<string.h>
    void main()
    {
    int i;
    FILE* fp;
    char fileName[]={"name"};
    char add[4]={'\0'};
    char s[]={"C PROGRAMMING"};//sample text that has to be written into the file
    for(i=0;i<10;i++)
    {
    add[0]=i;//is type conversion needed here ie. add[0]=(char)i; ???
    printf("%c",add[0]);
    strcat(fileName,add); //concatenating to change file name everytime
    fp=fopen(fileName,"wt");
    fprintf(fp,"%s",s);
    fclose(fp);
    }
    }
    the programming is running into an error state..

  4. #4
    Jack of many languages Dino's Avatar
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    A few errors:

    1) Yes, this line is no good:
    Code:
    add[0]=i;//is type conversion needed here ie. add[0]=(char)i; ???
    You can use sprintf() to convert i to a character string.

    2) You need to have enough room in array fileName[] to hold the largest built file name. Right now, it is only 5 bytes long ("name" followed by 0). Of you have 100 files, then fileName will need to be 3 bytes longer.

    3) If you initialize fileName to "name", as you are doing, then your logic will work the first time through the loop. But the second time through, you will append "2" to "name1", and you would get "name12". This is not what you want.
    Mac and Windows cross platform programmer. Ruby lover.

    Quote of the Day
    12/20: Mario F.:I never was, am not, and never will be, one to shut up in the face of something I think is fundamentally wrong.

    Amen brother!

  5. #5
    Registered User
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    Please don't post here, but in stead here:
    Naming files in c

    As that one's more active.

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