sbug not being set

please can you help me b4 monday

i tryed reading but it was not easy

It's a technical document. It's not supposed to be light reading.
To fully understand it, you'll probably have to read it several times, too !

this is what i coded

No, this is not what you coded, because it wouldn't even compile. "This" is something you re-typed in the text window. If you want to post something that you coded, you need to use copy&paste to avoid introducing more mistakes !
And while you're at it, please read the small print above the text window. It contains detailed instructions on how to post code so that it is legible.

main
{ SBUG="please send me a something"
something=SBUF
SBUF=soething+'my answer"
}

Okay. SBUF is an 8-bit register - a char. In C, you cannot simply copy a string (array of chars) to a single char by using a simple assignment. You will have to write a function that a) reads the string character by character, b) copies each character to SBUF, and c) waits until the UART is actually read to transmit the next character !

Also, you might want to configure the UART before using it. How to do this can be found in the documents mentioned above.

i see you think my code is bad and here is the new one

main
{
  SERIAL(9600,n,8,1,p);

  char SBUF[ "please send me a something" ];

  char something[] = SBUF;

  char SBUF[ something ] + SBUF[ "my answer" ];
}

i know SBUF is not array and i need [] for array so i try but it still doesnt work

i thinkit is bettar so i only get 2 errors now :)

main() isn't an arreay either, but maybe I can try with [] to get an application suitable for an array processor...

You have already received an answer that says that since SBUF is not an array, you must write a function that iterates through all characters in a string and emits them one-by-one (by first checking if the UART is empty before you write the next character to the SBUF (write-mapped) register).

That same post also said that you - for input - will have to write a function that reads characters one-by-one from the SBUF (read-mapped) register.

No post has invalidated that comment - because it is correct. So you can not just assume that creative use of [ and ] will allow you to perform miracles no one else has managed. SBUF is hardware, and if the hardware SBUF is a single character large, then it doesn't matter how much you try to play around with the compiler. Your hardware will not suddenly grow an array-compatible version of SBUF.

No, it is not better - because you have still not understood that SBUF is only a single byte (in each direction).

Leaving the 8051 and Keil specifics aside, it is not even valid 'C' - eg, what do you think will happen when you use a string as the index to a 'C' array...?!

"i know SBUF is not array and i need [] for array so i try"

You just said it: SBUF is not an array - therefore you cannot use [ ] with it!

You need to spend some time studying a basic 'C' textbook.

"... not even valid 'C' - eg, what do you think will happen when you use a string as the index ..."

Actually, the compiler probably will allow this - as it is, in fact, valid within the syntax of the 'C' language. However, I very much doubt that it will do what you want it to do...

yes