<<方法名称>>未在此范围内声明私有静态方法

我看到前面的线程叫做" '方法的名字'没有在这个范围内声明"，但是答案并没有真正帮助我。发生这种情况的方法是一个私有静态方法。我正试图在课堂上使用它，但它不起作用。方法的名称是"nthCoeffCatalan"。每次使用都会出现错误。我不知道这是否会有帮助，但我正在使用代码::块与wxWidgets和Mingw32的编译器。下面是.h文件:

#ifndef CATALAN_H
#define CATALAN_H
#include <vector>
#include <cstring>
#include <cstdlib>
#include <string>
using namespace std;
class Catalan
{
    public:
        Catalan(int);
        virtual ~Catalan( );
        void recursiveRandomGenerator( );
        void boltzmannRandomGenerator( );
        int rank( );
        void unrank(int, int);
        void outputBinaryTree( );
        void outputDyckPath( );
        void outputTriangulation( );
    private:
        int n;
        int catalanObject[];
        int max_size;
        static int nthCoeffCatalan(int);
};
#endif // CATALAN_H

.cpp文件:

#include <Catalan.h>
#include <math.h>
#include <time.h>
using namespace std;
int catalanObject[] = {};
int n;
int max_size;
Catalan::Catalan(int sz){
n = sz;
     //find out the position of the leaf in a tree which is just a node and n-1 right vertices
    max_size = 0;
    for(int i = 0; i <=n; i++){
        max_size += pow(2,i);
    }
    catalanObject[max_size];
    for (int i = 0; i < max_size; i++){
        catalanObject[i] = 0;
    }
}
Catalan::~Catalan( ){
    delete &n;
    delete &max_size;
    delete catalanObject;
}
void recursiveRandomGenerator( ){
    //initialize the random number generator
    srand(time(NULL));
    int r = n;
    int i = 0;
    //give the tree a root
    catalanObject[i] = 1;
    r--;
    //decide size of left and right trees
    float x = ((float) (rand()%10000))/(10000.0);
    int k = -1;
    float s = 0;
    int a_r = 0;
    int b_k = 0;
    int c_rk = 0;
    //calculate a_r
    if (r == 0){
        a_r = 1;
    }
    else{
        //calculate [x^r] in B(x)^2
        if (r > 1){
            for (int j = r/2; j >= 1; j--){
                int temp = 0;
                if (r%2 == 0 && j == r/2){
                    temp = nthCoeffCatalan(j);
                    temp = temp*nthCoeffCatalan(r-j);
                }
                else{
                    temp = nthCoeffCatalan(j);
                    temp = temp*nthCoeffCatalan(r-j);
                    temp = temp*2;
                }
                a_r += temp;
            }
        }
        //calculate [x^r] in 2B(x)
        a_r += 2*nthCoeffCatalan(r);
    }
    while (x > s){
        k = k + 1;
        //calculate b_k
        if (k == 0){
            b_k = 1;
        }
        else{
            b_k = nthCoeffCatalan(k);
        }
        //calculate c_rk
        if (k == r){
            c_rk = 1;
        }
        else{
            c_rk = nthCoeffCatalan(r-k);
        }
        //re-calculate s
        int temp;
        temp = (float) b_k;
        temp = temp * (float) c_rk;
        temp = temp / (float) a_r;
        s += temp;
    }

}
void boltzmannRandomGenerator( ){
}
int rank( ){
    return 0;
}
void unrank(int rnk, int n){
}
void outputBinaryTree( ){
}
void outputDyckPath( ){
}  
void outputTriangulation( ){
}
static int nthCoeffCatalan(int n){
    int num = 1;
    int den = 1;
    int retVal = 0;
    for(int i = 0; i < n; i++){
        num = num*(n+i+1); // runs from n+1 to 2n (=2n!/n!)
        den = den*(i+1); // runs from 2 to n (=n!)
    }
    retVal = num/den;
    return retVal;
}

边注

另外，作为旁注，我想使用数组作为类变量，但在构造函数中，在我初始化数组大小的那一行，我的调试器说代码没有作用。我做错什么了吗?