Arrays of pointers to functions and macro - C++ Function

C++ examples for Function:Function Pointer

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Description

Arrays of pointers to functions and macro

Demo Code

#include <iostream>
using namespace std;
// A macro to define dummy functions:
#define DF(N) void N() { \
cout << "function " #N " called..." << endl; }
DF(a); DF(b); DF(c); DF(d); DF(e); DF(f); DF(g);
void (*func_table[])() = { a, b, c, d, e, f, g };
int main() {/*from  w ww .  ja  v  a  2 s .  c  om*/
   while(1) {
      cout << "press a key from 'a' to 'g' "
      "or q to quit" << endl;
      char c, cr;
      cin.get(c); cin.get(cr); // second one for CR
      if ( c == 'q' )
         break; // ... out of while(1)
      if ( c < 'a' || c > 'g' )
         continue;
      (*func_table[c - 'a'])();
   }
}

Result


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