#include <iostream.h>
#include <stdlib.h>

int exp (int,int);
void readnums (int&, int&);

void main () {
  int b, e;
  readnums(b,e);
  cout << b << " to the " << e << " = " << exp(b,e) << endl;
}

void readnums (int& b, int& e) {
  int correctInput;

  cout << "Enter the base and the exponent: ";
  cin >> b >> e;

  if (!cin) { 
    cout << "Disaster! Terminating program." << endl;
    exit(-1);
  }

  correctInput = (b >= 0) && (e >= 0);
  while (!correctInput) {
    cout << "Something wrong! Try again ..." << endl;
    cout << "Re-enter base and exponent: ";
    cin >> b >> e;
    
    if (!cin) { 
      cout << "Disaster! Terminating program." << endl;
      exit(-1);
    }
    correctInput = (b >= 0) && (e >= 0);
  }
  
}

int exp (int b, int e) {
  int result;

  result = 1;
  while (e != 0) {
    result = result * b;
    e = e - 1;
  }
  return(result);
}