include iostream include fstream using namespace std bool visited int

#include <iostream>
#include <fstream>
using namespace std;

bool * visited;
int ** graph;
int n;


void ReadFile(char *nameFile)
{
    ifstream in;
    int sizeArray;

    in.open(nameFile, ios::in);
    in >> n;

    graph = new int*[n];
    visited = new bool[n];

    for (int i = 0; i < n; i++)
        graph[i] = new int[n];

    for(int i = 0; i < n; i++)
        for(int j = 0; j < n; j++)
            in >> graph[i][j];

    in.close();
}

void DFS(int st)
{
    int r;

    cout << st+1 << " ";

    visited[st] = true;

    for (r = 0; r <= n; r++)
        if ((graph[st][r] != 0) && (!visited[r]))
            DFS(r);
}

int main()
{
    setlocale(LC_ALL, "Rus");

    int start;

    ReadFile("test");

    cout<<"Матрица смежности графа: "<<endl;

    for (int i = 0; i < n; i++)
    {
        visited[i] = false;
        for (int j = 0; j < n; j++)
            cout << " " << graph[i][j];
            cout << endl;
    }

    cout << "Стартовая вершина >> ";
    cin >> start;

    cout << "Порядок обхода: ";
    DFS(start-1);

    cout << endl << "Недостижимые вершины: " ;

    for (int i = 0; i < n; i++)
        if(visited[i] == false)
            cout << i+1 << " ";

    delete [] visited;

    return 0;
}