How to create a Mex File out of C++ Code

Hello all,

I have an old C++ code that calculates Bowling scores for four people and I was hoping someone could teach me how to use the mex function. I am using Windows XP. My code is as follows.

#include <mex.h>
#include <iostream>
#include <cmath>

using namespace std;

int main(void) {
int score1 = 0,score2 = 0,
    frame = 1, 
    total[4],bowler[4];
bool lastwasstrike[4] = {false, false, false, false},
     last2strike[4] = {false, false, false, false},
     lastwasspare[4] = {false, false, false, false};
for (frame=1,frame<=10,frame++){
 for (int i=0,i<=4,i++){

    cout << "Enter next bowler's score ";

    cin >> score1;

    total[i] = total[i] + score1;  

    if (last2strike[i] = true){
      total[i] = total[i] + score1;
      last2strike[i] = false;
    }
    if (lastwasstrike[i] = true)
      total[i] = total[i] + score1;

    if (lastwasspare[i] = true){
      total[i] = total[i] + score1;
      lastwasspare[i] = false;
    }
    if (score1 < 10){
      cout << "Enter second score for this frame ";
      cin  >> score2;
      total[i] = total[i] + score2;
      if (lastwasstrike[i] = true){
        total[i] = total[i] + score2;
        lastwastrike[i] = false
      }
      if (score1 + score2 == 10){
        cout << "Spare! ";
        lastwasspare = true;
    }
    else {
      cout << "Strike!!! ";
      if (lastwasstrike[i] = true)
        last2strike[i] = true;

      lastwasstrike[i] = true;
    }
    cout << total[i]; 
   } 
  }

cout << "Game Over, final scores " << total[0] << " " << total[1] << " " << total[2] << " " << total[3];

return 0;
}

When I try entering mex project2a.cc into the command window it says

C:\PROGRA~1\MATLAB\R2012B\BIN\MEX.PL: Error: 'project2a.cc' not found.

If anyone could help me I would greatly appreciate it. Thank you!