integer concatenation with string again...

This is a discussion on integer concatenation with string again... within the C Programming forums, part of the General Programming Boards category; guys...i want to ask this again... regarding the concatenation of integer with a string... i still get a SEGMENTATION FAULT ...

  1. #1
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    integer concatenation with string again...

    guys...i want to ask this again...

    regarding the concatenation of integer with a string...
    i still get a SEGMENTATION FAULT ERROR!!!

    i already calloc(ED) the string...why is this happening? thanks again...

    what i did is

    void sendMessage (char ........end, char *host, int port)
    {
    printf ("it reached this part"); //it reached this part but a
    //segmentation fault occured on the next line
    sprintf (ssend,"%s:%d:%s",host,port,ssend)
    while (1)
    {
    rd = sendto(....)
    }
    }

  2. #2
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    Join Date
    Oct 2001
    Posts
    2,934
    Make sure ssend is calloc()'ed big enough to hold the string.

    It should have at least enough space for concatenating: host+port+ssend+3

    2 extra for the colons.
    1 extra for string terminator.

  3. #3
    Registered User
    Join Date
    Oct 2001
    Posts
    2,934
    I just noticed something.

    sprintf (ssend,"%s:%d:%s",host,port,ssend)

    I don't think you can use the same string for one of the sources and the destination (ssend).

    Create a new string, for example:

    char temp[80];
    sprintf (temp,"%s:%d:%s",host,port,ssend)

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