请你帮帮我解一下这道题吧

Question

Answer 1

#include<iostream>
//#include<math>
using namespace std;
int main()
{
    int a, b, c,x,y,x1,x2;
    cin >> a;
    cin >> b;
    cin >> c;
    if (b*b - 4*a*c < 0)
    {
        printf("have not sqrt");
    }
    if (b*b - 4 * a*c == 0)
    {
        x = -b / (2*a);
        cout <<"sqrt:"<< x << endl;
    }
    if (b*b - 4 * a*c > 0)
    {
        y = sqrt(b * b - 4 * a*c);
        x1 = (-b + y) / (2*a);
        x2 = (-b - y) / (2 * a); 
        printf("%.2f %.2f",x1,x2);
    }
}