dalao求掉

#include<bits/stdc++.h>
using namespace std;
int a,b,c,d;
double f(int x)
{
	return (a*x*x*x+b*x*x+c*x+d);
}
double sswr(double a)
{
	return ((int)a*1000)%10>=5?((int)(a*100+1))/100.0:((int)(a*100))/100.0;
}
int main()
{
	double x1,x2,x,s;
	scanf("%d %d %d %d",&a,&b,&c,&d);
	for(int i=-100;i<=100;i++)
	{
		x1=i;
		x2=i+1;
		if(f(x1)*f(x2)<0)
		{
			x=(x1+x2)/2;
			s=sswr(f(x));
			while(s!=0)
			{
				s=sswr(f(x));
				if(s<0)
				{
					x2=x;
					x=(x1+x2)/2;
				}
				else if(s>0)
				{
					x1=x;
					x=(x1+x2)/2;
				}
			}
			printf("%.2f ",x);
		}
		else if(f(x1)==0)
		     printf("%.2f ",x1);
	}
	return 0;
}