reading.cpp

#include <iostream>
#include <fstream>
#include <cstdlib>
#include <string>

using namespace std;

int main() {
    int i, j, dimension, elemento;

    ifstream myfile;
    myfile.open ("example.txt");

    while ( myfile.good() ){

            if(i==0){
                myfile >> dimension;
                cout << dimension;
                int matriz [dimension][dimension];
            }else{
                myfile >> elemento;
                cout << elemento ;



            }
            cout << endl;
            i++;
    }

    myfile.close();
}