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TM4C1290NCPDT: C++ Compiler Question - populating an array of addresses at compile time.

Doug Broadwell85
Intellectual 440 points
Part Number: TM4C1290NCPDT

Tool/software:

I have a graphics package that to display a listbox requires an array of pointers to C strings to display in each row.  The array of strings I'm displaying is created dynamically so I have an array of fixed length strings that I populate and then dynamically populate an array with the addresses of each of those strings:

char* pListBuff[Size];

char   ListBuff[Size][charsPerString];

Since the addresses of each string in ListBuff is known at compile time, is there a way in the compiler to create:  const char* pListBuff[Size]; ??

Thanks,

Doug

  • 0
    TI__Guru**** 183486 points
    Doug Broadwell85 said:

    Since the addresses of each string in ListBuff is known at compile time, is there a way in the compiler to create:  const char* pListBuff[Size]; ??

    Hi Doug, 

      I think you are asking a C language question rather than MCU. Not an expert in string manipulation but I think the below should work. 

    char *pListBuff[3] = {
                     "Apple",
                     "Orange",
                     "tomato"
                 };


    pListBuff[0] = "Pear"; // Change from Apple to Pear. Need to make sure the length of the new string is not longer than the initialized string
  • 0 in reply to Charles Tsai
    Intellectual 440 points

    Hi Charles

    It is a CCS compiler question, but when I start a new inquiry it requires a part number and forces me into the ARM thread.

    Yes, what I can do is:

    char List[200][20];   // Array of  200, 20 character strings.

    const char* pList[200] = {&List[0], &List[1], &List[2] ... &List[199] };  // Array of pointers to the 20 character strings.

    But I was hoping there was some compiler extension that would allow me to do this algorithmically instead of having to type out the list of addresses.

    Thanks

    Doug

  • +1 in reply to Doug Broadwell85
    TI__Guru**** 183486 points

    Hi Doug,

     I'm not sure what compiler extension you are referring to but I will pass your post to our compiler expert for comments.