#include <iostream.h>
#include <math.h>

float asqrt (float x, float precision) {
float guess;

guess = 1.0;
while (fabs(guess*guess-x) >= precision) {
guess = 0.5 * (guess + (x / guess));
}
return (guess);
}

int main () {
float x, precision;
cout << “Enter a real number and the precision: “;
cin >> x >> precision;
cout << “sqrt(” << x << “) is almost ” << asqrt(x,precision) << endl;
return(0);
}

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