Boolean expression second example using c++

#include <iostream.h>
#include <fstream.h>

typedef int Bool;

const Bool TRUE = 1;
const Bool FALSE = 0;

char printableBool (Bool i) {
  if (i==FALSE) {
    return 'F';
  }
  else {
    return 'T';
  }
}


int main () {

  ifstream f1, f2; 
  ofstream f3;
  f1.open("exam");
  f2.open("key");
  f3.open("result");

  int runningSum;
  int ans, key, score;

  runningSum = 0;

  f1 >> ans;
  f2 >> key;
  while (f1) {
    if (ans == key) {
      runningSum = runningSum + 25;
      score = TRUE;
    }
    else {
      score = FALSE;
    }
    f3 << printableBool (score) << endl;
    f1 >> ans;
    f2 >> key;
  }

  f3 << endl << runningSum << endl;  
  
}