Deep anatomy of C language [exercise continued]

 

Chapter 2

2.7
Leave a question:
For (I = 0, printf ("first = % d", I );
I <10, printf ("Second = % d", I );
I ++, printf ("Third = % d", I ))
{
Printf ("Fourth = % d", I );
}
What results are printed?

2.7.1
Let's first look at this: A ++ B and which of the following expressions want to be:
A), a ++ B;
B), a ++ B;

Chapter 3
3.1.4
Four questions:
A), # define sqr (x) * (x ))
# Define sum (x) + (X)
In the macro definition above, is "sum" and "sqr" a macro?
B), # define empty
Can this be defined?
C), print the macro defined value: printf ("sum (x)"); what is the result?
D), "# define M 100" is a macro definition?

Chapter 4

Three questions:
A) What is a pointer?
B), what is an array?
C) What is the relationship between arrays and pointers?

4.4.3
But if you modifyCodeWhat are the problems? What are the values of P3 + 1 and P4 + 1?
Int main ()
{
Char A [5] = {'A', 'B', 'C', 'D '};
Char (* P3) [3] = &;
Char (* P4) [3] =;
Return 0;
}
You can even modify the code:
Int main ()
{
Char A [5] = {'A', 'B', 'C', 'D '};
Char (* P3) [10] = &;
Char (* P4) [10] =;
Return 0;
}
What are the problems at this time? What are the values of P3 + 1 and P4 + 1?
We hope that you can consider these questions carefully.

4.7.3
(* (Char ** (*) (char **, char **) 0) (char **, char **);
Analyze the meaning of the above statements

5.3.5.4
Write two functions: generate a linked list and release a linked list. Both functions use only one header pointer.

5.3.5.5
Leave a question: Will an error occur if the NULL pointer is free multiple times in a row? Why? If you want to design free
Function, how do you deal with this problem?