(C++) CPP Programs - 2

2. Write a C program to find and output all the roots of a given Quadratic equation for non zero co-efficient. Incase of errors, your program should report suitable messages.

/* Quadratic equation*/

#include

#include

#include

#include

void main()

{

float a,b,c,root1,root2,root,ip,rp,disc;

clrscr();

printf("Enter the co-efficients of the quadratic equation\n\a");

scanf("%f%f%f",&a,&b,&c);

if(a*b*c==0)

{

printf("Equation is not possible\n\a");

exit(0);

getch();

}

printf("Equation is possible\n\a");

disc=(b*b)-(4*a*c);

if(disc==0)

{

printf("Roots are real and equal\n\a");

root=-b/(2*a);

printf("Roots are %f and %f\n\a",root,root);

}

else if(disc>0)

{

printf("Roots are real\n\a");

root1=(-b+sqrt(disc))/(2*a);

root2=(-b-sqrt(disc))/(2*a);

printf("Roots are %f and%f\n\a",root1,root2);

}

else

{

printf("Roots are complex\n\a");

rp=-b/2*a;

ip=sqrt((fabs)(disc))/2*a;

printf("Real part=%f+i%f\nImaginary part=%f+i%f\n",rp,ip,rp,ip);

}

getch();

}