#include <iostream>
float squareRoot(float num);
int main() {
float number;
std::cout << "Enter a number: ";
std::cin >> number;
if (number < 0) {
std::cout << "Square root is undefined for negative numbers." << std::endl;
} else {
float result = squareRoot(number);
std::cout << "Square root of " << number << " is: " << result << std::endl;
}
return 0;
}
float squareRoot(float num) {
float x = num;
float y = 1;
float epsilon = 0.000001; // Desired precision
while (x - y > epsilon) {
x = (x + y) / 2;
y = num / x;
}
return x;
}