#include#include#include#includevoid main(){long a; double xn,xnl;cout<<"input integer:";cin>>a;xn=float(a)/2;xnl=float(1)/2*(xn+float(a)/xn);while(fabs(xn-xnl)>1e-7){xn=xnl;xnl=float(1)/2*(xn+float(a)/xn) ;}cout<getch();}