右左法则

The right-left rule
Start reading the declaration from the innermost parentheses, go right, and then go left. When you encounter parentheses, the direction should be reversed. Once everything in the parentheses has been parsed, jump out of it. Continue till the whole declaration has been parsed.
One small change to the right-left rule: When you start reading the declaration for the first time, you have to start from the identifier, and not the innermost parentheses.
右左法则
法则运用如下：从最内部的括号开始阅读声明，向右看，然后向左看。当你碰到一个括号时就调转阅读的方向。括号内的所有内容都分析完毕就跳出括号的范围。这样继续，直到整个声明都被分析完毕。
对上述“右左法则”做一个小小的修正：当你第一次开始阅读声明的时候，你必须从变量名开始，而不是从最内部的括号。

1.
    int (*ff(int)) (int *,int)；
    //等价于
    typedef int (*pf)(int *,int);
    pf ff(int);
   
2.
    int (*Register (int (*pf)(const char *, const char *))) (const char *, const char *)
    //等价于
    typedef int (*pf)(const char *, const char *);
    pf Register(pf);
   
3.
    int * (* (*fp1) (int) ) [10];
    //等价于
    typedef int* (*pf)[10];
    typedef pf (*fp)(int);
    fp fp1;

   
4.
    int *( *( *arr[5])())();
    //等价于
    typedef int* (*fp)();
    typedef fp (*fp1)();
    fp1 (*arr)[5];

5.
    float ( *( *b())[] )();
    //等价于
    typedef float (*pf)();
    typedef pf (*parr)[];
    parr b();
   
6.
    void * ( *c) ( char, int (*)());
    //等价于
    typedef int (*pf)()
    typedef void* (*pf1)(char,pf);
    pf1 c;
   
7.
    void ** (*d) (int &, char **(*)(char *, char **));
     //等价于
    typedef char** (*pf)(char *, char **);
    typedef void** (*pf1) (int &, pf);
    pf1 d;

8.
    float ( * ( * e[10])(int &) ) [5];
     //等价于
    typedef float (*parr)[5];
    typedef parr (*pf)(int &);
    pf e[10];

9.
    double (*)()(*e)[9];
     //等价于
    typedef double (*pf)();
    pf (*e)[9];
   
10.
    int*(*a[5])(int,char *);
     //等价于
    typedef int* (*pf)(int,char *);
    pf a[5];