Finding roots
Problem Statement
Write a program to find roots of a quadratic equation using switch case.
import java.io.*; // for handling input/output
import java.util.*; // contains Collections framework
// don't change the name of this class
// you can add inner classes if needed
class Main {
public static void main (String[] args) {
Scanner sc = new Scanner(System.in);
float a = (float)sc.nextFloat();
float b =(float) sc.nextFloat();
float c = (float)sc.nextFloat();
float d = (float)((b*b)-(4*a*c));
float e=(float)(-b/(2*a));
float f=0.0f;
float g=0.0f;
int h = 0;
if(d>0){
h=1;
}
else if(d<0){
h=-1;
}
else{
h=0;
}
switch(h){
case 1 :f=(float)Math.sqrt(d);
g=(float)f/(2*a);
float r1=e+g;
float r2=e-g;
System.out.printf("%.2f",r1);
System.out.println();
System.out.printf("%.2f",r2);
break;
case -1 : f=(float)Math.sqrt(-d);
g=(float)f/(2*a);
String str1=String.format("%.2f",e);
String str2=String.format("%.2f",g);
System.out.printf(str1+"+i"+str2);
System.out.println();
System.out.printf(str1+"-i"+str2);
break;
case 0 :
f=(float)Math.sqrt(d);
g=(float)f/(2*a);
System.out.printf("%.2f",e);
break;
}
}
}
