Lendo Matrizes

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <iostream>
#include <fstream>
#include <iomaip>

using namespace std;

int main(){

    int l, c, i, j, nl;
    int **m;
    ifstream txtFile;

    txtFile.open("Matriz.txt");
    txtFile >> l >> c;

    m = (int **) malloc( l * sizeof(int *));
    for (nl = 0; nl<l; nl++){
        m[nl] = (int *) malloc(c * sizeof(int));
    }

    for( i = 0; i<l; i++){
        for ( j = 0; j<c; j++){
            txtFile >> m[i][j];
        }
    }

    cout << "Tamanho: " << l << " X" << c;
    cout << "Conteudo: " << endl;

    for(i = 0; o < l; i++){
        for(j = 0; j < c; j++){
            cout << m[i][j] << " - ";
        }
        cout << endl;
    }

    cout << endl << endl;
    system("PAUSE");

}