"Thinkinginc++" 18, pointer to function array

/*** function: pointer to function array * Time: August 14, 2014 07:24:46* Author: cutter_point*/#include <iostream> #include <cstdlib>using namespace std;//here n is the function name, and DF (n) represents the following N function, n can be changed to # define DF (n) void N () {cout<< "function" #N "is called" << Endl;} DF (a);D f (b);D F (c);D F (d);D f (e);D f (f);D F (g);  This is equivalent to 7 function void (*func_table[]) () ={a,b,c,d,e,f,g};int main () {    while (1)    {        cout<< "enter two characters in ' a ' to ' G ' Between, Q is Exit "<<endl;        Char C1, C2, C3;        cin>>c1>>c2;        c3= ' Q ';        Determine if the program should exit        if (c1 = = ' Q ') break            ;        if (c1< ' a ' | | | c1> ' g ')            continue;        (*func_table[c1-' a ']) ();        cout<< "#c1:" <<c1<< "\T#C2:" <<c2<<endl;    }    System ("pause");    return 0;}