Q.Write a C program to find the roots of the quadratic equation ax^2 + bx + c = 0 using the switch-case statement. The textbook presents this worked program, transcribed exactly as printed (including its printed errors):

/*program to find the square root of the given quadratic equation using switch case */  
#include<stdio.h>  
#include<conio.h>  
#include<math.h>  
main()  
{  
int choice;  
float a,b,c,d,i,rpart,ipart,r1,r2;  
clrscr();  
printf("Enter the values of a,b,c,\n");  
scanf("%f%f%f",&a,&b,&c);  
d=b*b-4*a*c;  
if(d>0)  
{  
choice=1;  
}  
else  
if(d==0)  
{  
choice=2;  
}  
else  
{  
choice=3;  
}  
switch(choice)  
{  
case 1:printf("The roots are real and unequal\n");  
    r1=(-b+sqrt(d))/(2*a);  
    r2=(-b-sqrt(d))/(2*a);  
    printf("r1=%.3f\nr2=%.3f",r1,r2);  
    break;  
case 2:printf("The roots are equal\n");  
    r1=b/(2*a);  
    r2=r1;  
    printf("r1 and r2 are %.3f\n",r1);  
    break;  
case 3:printf("The roots are imaginary\n");  
    d=sqrt(abs(d));  
    rpart=-b/(2*a);  
    ipart=d/(2*a);  
    printf("r1=%.3f+i%.3f\n",rpart,ipart);  
    printf("r2=%.3f-i%.3f\n",rpart,ipart);  
}  
getch();  
}