测试点信息源代码
源代码 复制
#include<iostream>
using namespace std;
double a, b, c, d;
double* A = new double[20100];
int main()
{
	cin >> a >> b >> c >> d;
	A[0] = -100.00;
	for (int i = 1; i < 20100; i++)
	{
		A[i] = A[i-1]+0.01;
	}
	for (int i = 0; i < 20100; i++)
	{
		if(a * A[i] * A[i] * A[i] + b * A[i] * A[i] + c * A[i] + d==0)
		{
			printf("%.2f", A[i]);
			printf(" ");
		}
		else if ((a * A[i] * A[i] * A[i] + b * A[i] * A[i] + c * A[i] + d) * (a * A[i + 1] * A[i + 1] * A[i + 1] + b * A[i + 1] * A[i + 1] + c * A[i + 1] + d) < 0)
		{
			if ((a * A[i] * A[i] * A[i] + b * A[i] * A[i] + c * A[i] + d) * (a * ((A[i] + A[i + 1]) / 2) * ((A[i] + A[i + 1]) / 2) * ((A[i] + A[i + 1]) / 2) + b * ((A[i] + A[i + 1]) / 2) * ((A[i] + A[i + 1]) / 2) + c * ((A[i] + A[i + 1]) / 2) + d) <= 0)
			{
				printf("%.2f", A[i]);
				printf(" ");
			}
			else {
				printf("%.2f", A[i + 1]);
				printf(" ");
			}
		}
	}
}