蓝桥杯算法提高VIP-Quadratic Equation-题解(C++代码)

#include <iostream>
#include <iomanip>
#include <math.h>
using namespace std;
int main(){
    double a,b,c;
    cin>>a>>b>>c;
    double m=b*b-4*a*c;
    double x1,x2;
    if(m>0){
        x1=-b/(2.0*a)+sqrt(m)/(2.0*a);
        x2=-b/(2.0*a)-sqrt(m)/(2.0*a);
    }
    if(m==0){
        x1=-b/(2*a);
        x2=-b/(2*a);
    }
    if(m<0){
        x1=-b/(2.0*a)+sqrt(m)/(2.0*a);
        x2=-b/(2.0*a)-sqrt(m)/(2.0*a);
    }
    if(x1>x2){
        cout<<fixed<<setprecision(2)<<x1<<" "<<x2;
    }else{
        cout<<fixed<<setprecision(2)<<x2<<" "<<x1;
    }
    return 0;
}