ex1

#include <iostream>
#include <cmath>

using namespace std;

int main() {

 float a,b,c,delta,x1,x2;

 do {
 cout<<"a=";cin>>a;
 } while (!a);//
 cout<<"b=";cin>>b;
 cout<<"c=";cin>>c;

 delta=(b*b-4*a*c);
 if (delta>=0)  {
   delta=sqrt(delta);
 x1=(-b+delta)/(2*a);//*/
x2=(-b-delta)/(2*a);
cout<<"x1="<<x1<<endl;
cout<<"x2="<<x2<<endl;
 }
 else
    cout<<"ecuatia nu are solutii";

 return 0;
}