Reference to a formal list of Tokens in C

Question

How many tokens are there in each

1. ->
2. int *ptr = &x;
3. ++a
4. >=
5. !=
6. x += 10;

Token should be counted before pre-processing or after it?

from my experience only, I'm able to identify what are considered as tokens are and what not. I want a reliable reference to know what all tokens are there in C. Does a token depends on what compiler is in use? 

Create a standard list of tokens for GATE exam.

Comments

In the 6th point i got 4 tokens please explain me if i am wrong.

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yes in 6th number of tokens should be 4.

Answer 1

1. ->  token = 1 
2. int *ptr = &x; token = 7
3. ++a token = 2
4. >=  token = 1
5. !=  token = 1
6. x += 10; token= 4

Find maximum length lexeme.which has some meaning 

example ++ we can think it is two + but ++ has meaning of increament. so considerd as 1

Comments

Updated my question. May you please update this answer.

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It should be noted that a whitespace is also a token in some languages. But in C, it is ignored.

Also, point no. 6 -> x += 10; has 4 tokens and not 3.

Answer 2

Please go through this link once :

http://stackoverflow.com/questions/34101633/are-the-tokens-counted-after-pre-processing-or-during-the-process-of-pre-process?noredirect=1#comment55976819_34101633