#include <iostream>

using namespace std;  //introduces namespace std

double exp_i (double base, int power, double);
double exp-r (double base, int power);

int main()
{	
	cout << exp_i (2,7,1);
	return 0;
}

double exp_i (double base, int power, double answer) {
	if (power == 0){
		cout << "exp_i(" << base << "," << power 
		<< "," << answer << ")\n" << endl;
		return answer;
	}
	else {
		//cout << "the answer is currently " << answer << endl;
		cout << "exp_i(" << base << "," << power 
		<< "," << answer << ")\n" << endl;
		exp_i(base, power-1,base*answer);
	}
}

/*
double exp-r (double base, int power) {
	if (power == 0){
		cout << "base is " << base << ", power is " << power << endl;
		return 1;
	}
	else{
		cout << "base is " << base << ", power is " << power << endl;
		return base *  exp (base, power-1);
	}
}
*/