/* Bai tap 1_31 - Tinh can bac hai theo phep lap Newton */

#include <stdio.h>

#include <math.h>

void main()

{

double a, xn, ketqua;

printf("

Nhap vao so muon tinh can bac hai : ");

scanf("%lf", &a);

xn = (a+1)/2;

do {

ketqua = xn;

xn = 0.5 * (xn + a/xn);

} while (fabs(xn-ketqua) > 0.0001);

printf("

Ket qua = %lf", xn);

getch();

}