Send command for RC Car

Code:
led==HIGH;
Wrong. == is a comparison operator. = is an assignment operator.

About this i make this mistake during write the code.

inData is the address of an array. turn_lft_On is the address of an array. It should be obvious that the addresses are not the same. strcmp() bears looking at.

Thanks for your advice, i use the strcmp()function and it´s working great.

One more time thank you very much, if you need something i can help.

I learning arduino and C programming, i want to buy a good for this, what is your advice, i see arduino cookbook like a good choice?