编写题解 1484: 蓝桥杯算法提高VIP-Quadratic Equation

解题思路:

注意事项:

参考代码:

#include<iostream>
#include<math.h>
#include<iomanip>
using namespace std;

int main()

{

    double a,b,c;

    cin>>a>>b>>c;

    double x1,x2;

    x1=(-b+sqrt(b*b-4*a*c))/(2*a);

    x2=(-b-sqrt(b*b-4*a*c))/(2*a);

    if(b*b-4*a*c!=0)

    {

        if(x1>x2) // 判断两个根的大小关系

        cout<<fixed<<setprecision(2)<<x1<<" "<<x2<<endl;

        else

        cout<<fixed<<setprecision(2)<<x2<<" "<<x1<<endl;

    }

 

    if(b*b-4*a*c==0)

    cout<<fixed<<setprecision(2)<<x1<<endl;

    return 0;

}