Answer to Question #330707 in C++ for Secret Agent

Question

Reverse Engineering

by CodeChum Admin

Functions that return the value of a base and an exponent is very common so I want to switch it up.

This time, we’re going to try to reverse-engineer these functions and find out the exponent of a certain number based on the value of the result and the base used to get that value.

Instructions:

1. In the code editor, you are provided with a main() function that asks the user for two integer inputs:
2. The first integer is the base
3. The second integer is the result
4. Furthermore, you are provided with the getExponent() function which is partially implemented. The details of this function are the following:
5. Return type - int
6. Name - getExponent
7. Parameters
8. int - base
9. int - result
10. Description - this recursive function returns the exponent
11. Your task is to add the base case of this recursive function so that it will work properly.

Input

1. The base

2. The result

Output

Enter·the·base:·2
Enter·the·result:·8
Exponent·=·3

Answer 1

#include <iostream>
#include <cmath>

using namespace std;


int getExponent(int base, int result)
{
	static int exp = 1;
	static int base0 = base;
	if (base != result)
	{
		exp++;
		base *= base0;
		return getExponent(base, result);
	}
	return exp;
}

int main()
{
	int base, result;
	cout << "Please, enter two integers: \n";
	cout << "Enter the base: ";
	cin >> base;
	cout << "Enter the result: ";
	cin >> result;
	cout << "Exponent: " << getExponent(base, result);
}