1.7.4.
, , ,
.
.
int a[]={10,11,12,13,14,};
int *p[]={a, a+1, a+2, a+2, a+3, a+4};
int **pp=p;
,
.4.
+---+
|pp |----+
+---+ V
+---+ +---+---+---+---+---+
| p |->| | | | | |
+---+ +-|-+-|-+-|-+-|-+-|-+
V V V V V
+---+ +---+---+---+---+---+
| a |->|10 |11 |12 |13 |14 |
+---+ +---+---+---+---+---+
.4. .
pp-p , pp
p ,
p ( p[0]).
pp+=2 ,
.5.
+---+
|pp |------------+
+---+ V
+---+ +---+---+---+---+---+
| p |->| | | | | |
+---+ +-|-+-|-+-|-+-|-+-|-+
V V V V V
+---+ +---+---+---+---+---+
| a |->|10 |11 |12 |13 |14 |
+---+ +---+---+---+---+---+
.5.
pp+=2.
pp-p 2, pp
p. *pp-a 2,
*pp a, a
a. **pp 12
- a. *pp++
p ..
a.
, pp=p, *++pp
a (.. 11), ++*pp p[0],
, a[1].
. *(++(*pp))
: *pp
p[0], ++(*p)
p[0] a[1],
, .. 11.
,
.
int a[3][3]={ { 11,12,13 },
{ 21,22,23 },
{ 31,32,33 } };
int *pa[3]={ a,a[1],a[2] };
int *p=a[0];
.6.
+-----+
| p |---------------+
+-----+ V a
+-----+ +--+--+--+
|pa[0]|--- =a[0]---->|11|12|13|
|-----| |--|--|--|
|pa[1]|--- =a[1]---->|21|22|13|
|-----| |--|--|--|
|pa[2]|--- =a[2]---->|31|32|33|
+-----+ +--+--+--+
.6. .
a[0][0] a, p,
pa : a[0][0], *a, **a[0], *p, **pa,
*p[0].
.
char *c[]={ "abs", "dx", "yes", "no" };
char **cp[]={ c+3, c+2 , c+1 , c };
char ***cpp=cp;
.7.
+----+
|cpp |
+----+
+-----+-----+-----+-----+
|cp[0]|cp[1]|cp[2]|cp[3]|
+-----+-----+-----+-----+
+-----+-----+-----+-----+
|c[0] |c[1] |c[2] |c[3] |
+-----+-----+-----+-----+
+---+ +---+ +---+ +---+
| a | | d | | y | | n |
| b | | x | | e | | o |
| s | |\0 | | s | |\0 |
|\0 | +---+ |\0 | +---+
+---+ +---+
.7. .
.8-11.
+----+ +----+
|cpp | |cpp |
+----+ +----+
+-----+-----+-----+-----+ +-----+-----+-----+-----+
|cp[0]|cp[1]|cp[2]|cp[3]| |cp[0]|cp[1]|cp[2]|cp[3]|
+-----+-----+-----+-----+ +-----+-----+-----+-----+
+-----+-----+-----+-----+ +-----+-----+-----+-----+
|c[0] |c[1] |c[2] |c[3] | |c[0] |c[1] |c[2] |c[3] |
+-----+-----+-----+-----+ +-----+-----+-----+-----+
+---+ +---+ +---+ +---+ +---+ +---+ +---+ +---+
| a | | d | | y | | n | | a | | d | | y | | n |
| b | | x | | e | | o | | b | | x | | e | | o |
| s | |\0 | | s | |\0 | | s | |\0 | | s | |\0 |
|\0 | +---+ |\0 | +---+ |\0 | +---+ |\0 | +---+
+---+ +---+ +---+ +---+
.8. .9.
*(*(++cpp)) (*(--(*(++cpp))))+2
+----+ +----+
|cpp | |cpp |
+----+ +----+
+-----+-----+-----+-----+ +-----+-----+-----+-----+
|cp[0]|cp[1]|cp[2]|cp[3]| |cp[0]|cp[1]|cp[2]|cp[3]|
+-----+-----+-----+-----+ +-----+-----+-----+-----+
+-----+-----+-----+-----+ +-----+-----+-----+-----+
|c[0] |c[1] |c[2] |c[3] | |c[0] |c[1] |c[2] |c[3] |
+-----+-----+-----+-----+ +-----+-----+-----+-----+
+---+ +---+ +---+ +---+ +---+ +---+ +---+ +---+
| a | | d | | y | | n | | a | | d | | y | | n |
| b | | x | | e | | o | | b | | x | | e | | o |
| s | |\0 | | s | |\0 | | s | |\0 | | s | |\0 |
|\0 | +---+ |\0 | +---+ |\0 | +---+ |\0 | +---+
+---+ +---+ +---+ +---+
.10. .11.
(*(cpp[-2]))+2 ((cpp[-1])[-1]+1
|
|
