Question

#include <iostream>

#include <chrono>

using namespace std;

double improvedPow(double x, int y)

{

// To be implemented by you

}

int main()

{

cout << "To calculate x^y ..." << endl;

double x;

int y;

cout << "Please enter x: ";

cin >> x;

cout << "Please enter y: ";

cin >> y;

if(x == 0) {

if (y > 0)

cout << 0 << endl;

else

cout << "x^y is not defined" <<endl;

}

else {

cout << improvedPow(x,y) << endl;

return 0;

}

Answer 1

#include <iostream>
#include <chrono>

using namespace std;

double improvedPow(double x, int y) {
    if (y == 0) {
        return 1;
    } else {
        if (y > 0) {
            double res = improvedPow(x, y / 2);
            if (y % 2 == 0) {
                return res * res;
            } else {
                return res * res * x;
            }
        } else {
            return 1.0 / improvedPow(x, -y);
        }
    }
}

int main() {
    cout << "To calculate x^y ..." << endl;
    double x;
    int y;
    cout << "Please enter x: ";
    cin >> x;
    cout << "Please enter y: ";
    cin >> y;
    if (x == 0) {
        if (y > 0)
            cout << 0 << endl;
        else
            cout << "x^y is not defined" << endl;
    } else {
        cout << improvedPow(x, y) << endl;
        return 0;
    }
}