Help reading a file and picking out numerical values

Hello everyone,

So what i'm trying to do is read a file which contains both characters and numbers
I'm kinda new to c++ so bear with me a little bit :P
So i cast the lines into strings with getline and then try and convert that with sscanf . In order to do that though i must make a distinction between lines. lines starting with f are for inteer values whereas those starting with v are for floating. The code seems stuck once i try to run it somewhere and i can't figure out where. I'll include both a sample of the file and my code. any feedback is much appreciated!

Code:
===================================

#include <iostream>
#include <fstream>
#include <string>
#include <stdio.h>
#include <stdlib.h>
using namespace std;

int main ()
{
    ifstream myobject("Model_1.txt");
    string line;
    if(!myobject.good()) {
        cout << " Problem reading Object file! Aborting. ";
    }
    int number_of_lines = 0,counter,i;
    while ( getline(myobject, line) ){
       ++number_of_lines;
    }
    myobject.close();
    myobject.open("Model_1.txt");
    cout << 1 <<endl;
   
    int Buffer_float_vector[3];
   float Buffer_int_vector[3];
    float Coordinate_Matrix[number_of_lines][3];

    cout << 2 << endl;

    counter=0;
    while(!myobject.eof() )
    {
            getline(myobject, line);

            if (line.c_str()[0] == 'v'){
                line[0]=' '; // set pointer to 0 at the 1st character found
                sscanf(line.c_str(),"%f %f %f", &Buffer_float_vector[0],
                                                    &Buffer_float_vector[1],
                                            &Buffer_float_vector[2]);
                cout << counter << endl;
                cout << Buffer_float_vector[0] <<" "<< Buffer_float_vector[1] <<" "<< Buffer_float_vector[2] << endl; //
                for(i=0;i=2;i++){
                    Coordinate_Matrix[counter][i]=Buffer_float_vector[i];
                    Buffer_float_vector[i]= ' '; //
                }
                counter++;
            }
            else if (line.c_str()[0] == 'f'){
            line[0] = ' ';
             sscanf(line.c_str(),"%i %i %i",
                    &Buffer_int_vector[0],
                    &Buffer_int_vector[1],
                    &Buffer_int_vector[2] );

            cout << counter << endl; //
             for(int i=0;i=2;i++){
                    Coordinate_Matrix[counter][i]=Buffer_float_vector[i];
                    Buffer_int_vector[i]=' ';
                }
            counter++;
            }
            else{
            counter = -1;
            }

    }

    cout << " First Matrix Element : " << Coordinate_Matrix[1][0] << " || " << Coordinate_Matrix[1][1] << " || " << Coordinate_Matrix[0][2] << endl;
    cout << " Last Matrix Element : " << Coordinate_Matrix[number_of_lines][0] << " || " << Coordinate_Matrix[number_of_lines][1] << " || " <<Coordinate_Matrix[number_of_lines][2] << " || " << endl;
    cout << " counter = " << counter;
    myobject.close();
    return 0;
}

=================================

File Sampple :

v 10.20 25.51 98.99
v 55.11 66.22 25.11
f 12 58 23
f 15 07 95
f 18 12 95

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