Returning a string...

This is a discussion on Returning a string... within the C Programming forums, part of the General Programming Boards category; It is possible to return a String from a function? If yes, how? I'am trying to return a full string ...

  1. #1
    Registered User Vber's Avatar
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    Returning a string...

    It is possible to return a String from a function?
    If yes, how?

    I'am trying to return a full string from this function:
    Code:
    char substr(char *str, int start, int end)
    {
        int i,j;
        char strCp[100];
       
        for(i = start, j = 0; i <= end; i++,j++)
            strCp[j] = str[i];
        
        strCp[j] = '\0';
        
        return *strCp;
    }
    But this dont work... he just returns 1 char, not all the string.

  2. #2
    Code Goddess Prelude's Avatar
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    To return a string, make the return type char *. But in this case it won't work because your string is local, when the function returns it goes away so a pointer to it is invalid.

    -Prelude
    My best code is written with the delete key.

  3. #3
    Registered User Vber's Avatar
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    So, no way to solve my problem here?

    Hmm, just assigning to an global variable the value of my local variable? or this isnt good too?

  4. #4
    End Of Line Hammer's Avatar
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    You could strcpy() your local string to a global one if you wanted, in which case you wouldn't have to return it. However, use of global variables should be kept to a minimum.

    It is better to pass the function a pointer to a pre-allocated buffer, along with the size of the buffer. The function can then write data directly to it.
    When all else fails, read the instructions.
    If you're posting code, use code tags: [code] /* insert code here */ [/code]

  5. #5
    Registered User Vber's Avatar
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    Ok, I got it :)

    Thanks for the help

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