public class Root
{
int a,b,c;
double x1,x2;
public Root(int i,int j,int k)
{
a=i;
b=j;
c=k;
x1=(-b+Math.sqrt(b*b-4*a*c))/(2*a);
x2=(-b-Math.sqrt(b*b-4*a*c))/(2*a);
}
public void showResult()
{
System.out.println("方程的系数为:a="+a+"b="+b+"c="+c);
System.out.print("方程的两个根:");
System.out.print("x1="+x1);
System.out.print("x2="+x2);
}
public static void main(String args[])
{
Root obj=new Root(1,-5,4);
obj.showResult();
}
}