请各位赐教：函数指针数组的有关问题，实在不明白为什么有错？

请各位赐教：函数指针数组的问题，实在不明白为什么有错？？
#include <iostream>
using namespace std;

class A
{
public:
void f(int)
{
cout<<"a";
}

void f(double)
{
cout<<"b";
}

void f2(int)
{
cout<<"c";
}

void f2(double)
{
cout<<"d";
}

};

int main(int argc, char* argv[])
{
A a;
void (*f_c[2])(int) = {a.f, a.f2};

f_c[0](0);  

return 0;
}

vs提示错误：
a pointer to a bound function may only be used to call the function

编译报错：
error C2440: 'initializing' : cannot convert from 'overloaded-function' to 'void (__cdecl *)(int)'

还有个问题：
f_c[0](0);  
还可以这样写： (*f_c[0])(0); ，这是为什么呢？

[解决办法]
仅供参考

C/C++ code

#include <stdio.h>double A[300][100];double valuex[300];double valuey[300];int i;double fun00(double x,double y) {return x  +   y  ;};double fun01(double x,double y) {return x*x+ 3*y  ;};double fun02(double x,double y) {return x  + 2*y*x;};//...  fun03(double x,double y) {return ...+...   ;};//...//...  fun98(double x,double y) {return ...+...   ;};double fun99(double x,double y) {return x/2+20*y  ;};double (*funNN[100])(double,double)={    fun00,    fun01,    fun02,//  fun03,//  ...//  fun98,    fun99,};int main() {    double x,y;    int f,FN;    for (i=0;i<300;i++) {        valuex[i]=(double)i;        valuey[i]=(double)i;    }    FN=3;    for (i=0;i<300;i++) {         x=valuex[i];         y=valuey[i];         for (f=0;f<FN;f++) A[i][f]=funNN[f](x,y);    }    for (i=0;i<3;i++) {        for (f=0;f<FN;f++) printf("%lg ",A[i][f]);        printf("\n");    }    return 0;}//0 0 0//2 4 3//4 10 10
[解决办法]
你他呀的用的类函数, 没看到的.

 typedef void (A::*ptr_func)(int);
 ptr_func f_c[2];