View Code of Problem 74

#include<stdio.h>
#include<math.h>
#include<string.h>
void main()
{
	double x0,x1,s;
	scanf("%lf",&s);
	x0=s/2.0;
	x1=(x0+s/x0)/2.0;//通过迭代法缩小x0和x1的差距，让x1最终靠近平方根
	while(abs(x0-x1)>=1e-5)
	{
		x0=x1;
		x1=(x0+s/x0)/2.0;
	}
	printf("%.3lf",x1);
}