蓝桥杯算法训练超全习题题解VIP版——ALGO-160.P0104

每日刷题（六十九）

ALGO-160、P0104

#include<iostream> 
#include<cmath>
#include<iomanip>
using namespace std;

#define EPS 1e-6

int main()
{
	double a, b, c;
	cin >> a >> b >> c;
	double disc = b * b - 4 * a * c;
	if(fabs(disc) <= 1e-6)
	{
		cout << fixed << setprecision(6) << "x1 = " << -b / (2 * a) << endl;
	}
	else if(disc < 0)
	{
		cout << "Error" << endl;
	}
	else
	{
		cout << fixed << setprecision(6) << "x1 = " << (-b + sqrt(disc)) / (2 * a) << endl;
		cout << fixed << setprecision(6) << "x2 = " << (-b - sqrt(disc)) / (2 * a) << endl;
	}
	return 0;
}

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