蓝桥杯算法提高VIP-Quadratic Equation （C++代码）

#include<iostream>
#include<math.h>
#include<iomanip>
using namespace std;
int main(){
    double a,b,c;
    while(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)
                cout<<fixed<<setprecision(2)<<x1<<" "<<x2<<endl;
            else
                cout<<fixed<<setprecision(2)<<x2<<" "<<x1<<endl;
        }
        else if(b*b-4*a*c==0)
        cout<<fixed<<setprecision(2)<<x1<<endl;         
    }
    return 0;
}

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参考代码: