linux编程之指针

　　这个是数组指针、指针数组、二维数组之间相互转换的代码　

 #include<stdio.h>
 void main()
         {
          int a[2][4]={1,2,3,4,5,6,7,8};
          int *b=NULL;
          int **c;
          int (*d)[4];
 
          int * e[5];
          b=*(a+1)+1;
          e[0]=&a[0][0];
          d=a;
          //a[][] equal **c equal (*d)[]
 
         //about (*d)[4] **d
          printf("about (*d)[4] **d (*(d+1)[1])
");
          printf("(*d)[0]:%d
(*(d+1)[1]):%d
**d:%d
*(*d+1):%d
*(*(d+1)+1):%d
",(*d)[0],(
    *(d+1))[1],**d,*(*d+1),*(*(d+1)+1));
 
          //about *(a[0]+1) **(a+1) *(*(a+1)+1) !!!!!
          printf("about *(a[0]+1) **(a+1) *(*(a+1)+1)
");
          printf("a[1][2]:%d
",a[1][2]);
          printf("*b:%d
",*b);
          printf("*(*a+1):%d
*(*(a+1)):%d
*(a[0]):%d
**a:%d
",*(a[0]+1),**(a+1),*(a[0]),*
    *a);
          printf("*(*(a+1)+1):%d
*(*(a)+2):%d
*(a[0]+1):%d
",*(*(a+1)+1),*(*(a)+2),*(a[0]+
    2));
          printf("about *e[0]");
          printf("*e[0]:%d
",*e[0]);
 }

　　输出结果

about (*d)[4] **d (*(d+1)[1])
(*d)[0]:1
(*(d+1)[1]):6
**d:1
*(*d+1):2
*(*(d+1)+1):6
about *(a[0]+1) **(a+1) *(*(a+1)+1)
a[1][2]:7
*b:6
*(*a+1):2
*(*(a+1)):5
*(a[0]):1
**a:1
*(*(a+1)+1):6
*(*(a)+2):3
*(a[0]+1):3
about *e[0]*e[0]:1