Ecuación de segundo grado - Equation du second degré

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

double delta(double a,double b,double c){//Interieur racine
    return ((pow(b,2)-(4 * a * c)) );
}

double racine(double a,double b,double c){
    return sqrt (abs (delta(a,b,c)));
}


int main() {
    double a,b,c;

    cout<<" a= ";cin>>a;
    cout<<" b= ";cin>>b;
    cout<<" c= ";cin>>c;

    cout <<endl<<a<<"x^2+"<<b<<"x+"<<c<<"=0"<<endl<<endl;

    if (delta(a,b,c)>=0){//Sol.Reel
        cout <<"x1=\t"<<((-b + racine(a,b,c))/(2*a*1.0))<<endl
             <<"x2=\t"<<((-b - racine(a,b,c))/(2*a*1.0))<<endl;
    }else{//Sol.Complexe
        cout <<"x1=\t"<<((-b)/(2*a*1.0)) <<"+"<< racine(a,b,c)/(2*a*1.0)<<'i'<<endl;
        cout <<"x2=\t"<<((-b)/(2*a*1.0)) <<"-"<< racine(a,b,c)/(2*a*1.0)<<'i'<<endl;
    }

return 0;
}