Как исправить ошибку C4715 в коде?

#include<iostream>
#include<stdlib.h>
 
// The maximum number of the vertex for the sample random graph.
#define NOV 20
 
using namespace std;
 
// A function to check for the cycle, on addition of a new edge in the random graph.
bool CheckAcyclic(int * edge[], int ed, bool check[], int v)
{
    int i;
    // If the current vertex is visited already, then the graph contains cycle.
    if (check[v] == true)
    {
        return false;
    }
    else
    {
        check[v] = true;
        // For each vertex, go for all the vertex connected to it.
        for (i = ed; i >= 0; i--)
        {
            if (edge[i][0] == v)
            {
                return CheckAcyclic(edge, ed, check, edge[i][1]);
            }
        }
    }
    // In case, if the path ends then reassign the vertexes visited in that path to false again.
    check[v] = false;
 
    if (i == 0)
        return true;
}
 
// A function to generate random graph.
void GenerateRandGraphs(int e)
{
    int i, j, count;
    int **edge = new int*[e];
    for (i = 0; i < e; i++)
    {
        edge[i] = new int[2];
    }
 
    bool check[21];
 
    // Build a connection between two random vertex.
    i = 0;
    while (i < e)
    {
        edge[i][0] = rand() % NOV + 1;
        edge[i][1] = rand() % NOV + 1;
 
        for (j = 1; j <= 20; j++)check[j] = false;
 
        if (CheckAcyclic(edge, i, check, edge[i][0]) == true)
            i++;
    }
 
    // Print the random graph.
    cout << "\nThe generated random random graph is: ";
    for (i = 0; i < NOV; i++)
    {
        count = 0;
        cout << "\n\t" << i + 1 << "-> { ";
        for (j = 0; j < e; j++)
        {
            if (edge[j][0] == i + 1)
            {
                cout << edge[j][1] << "  ";
                count++;
            }
            else if (edge[j][1] == i + 1)
            {
                count++;
            }
            else if (j == e - 1 && count == 0)
                cout << "Isolated Vertex!";
        }
        cout << " }";
    }
}
 
 
int main()
{
    int e;
 
    cout << "Enter the number of edges for the random graphs: ";
    cin >> e;
 
    // A function to generate a random undirected graph with e edges.
    GenerateRandGraphs(e);
}

bool CheckAcyclic(int * edge[], int ed, bool check[], int v)
{
    // ...
 
    check[v] = false;
 
    if (i == 0)
        return true;
 
    return false;
}