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Arrays in C

Rumman Syed
Prodigy 40 points


Hi I have a very silly question. I have been getting this error and I can't figure out why

char value = 0x08;

char Command[2] = {value, 0x00};

I get an error: expression must have a constant value, if I try to compile this way, but i don't get an error if I try to compile it this way

char Command[2] = {0x08, 0x00};

i don't see why it will throw me the error

Thanks

  • 0
    Expert 1190 points

    I think it's pretty clear. You variable value, is not a fixed value, it may change, so it doesn't know how to initialize the variable Command.

    I see two possible solutions here, the first one, make value a fixed value:

    #define VALUE      0x08
char Command[2] = {VALUE, 0x00};

    The other one, initialize it later:

    char value = 0x08;
char Command[2];
Command[0] = value;
Command[0] = 0x00;

    I have not tried these, but I guess they will work.

    Good luck.

  • 0 in reply to Jon Zarate
    TI__Guru* 84285 points
    If you're willing to compile the file as a C++ file, this works:
    const char value = 0x08;
    char Command[2] = {value, 0x00};