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Simple Programming Tutorials For Beginners

Sunday, December 11, 2016

Square Root

/*
Summary: Finds roots of a quadratic equation ax2+bx+c=0 where a, b and c are coefficients. This program will ask the coefficients: a, b and c from user and displays the roots.
*/

#include <stdio.h>
#include <math.h>

int main()
{
 float a, b, c, determinant, r1,r2, real, imag;

 printf("Enter coefficients a, b and c: ");
 scanf("%f%f%f",&a,&b,&c);

 determinant=b*b-4*a*c;
 if (determinant>0)
 {
  r1= (-b+sqrt(determinant))/(2*a);
  r2= (-b-sqrt(determinant))/(2*a);
  printf("Roots are: %.2f and %.2f",r1 , r2);
 }
 else if (determinant==0)
 {
  r1 = r2 = -b/(2*a);
  printf("Roots are: %.2f and %.2f", r1, r2);
 }
 else
 {
  real= -b/(2*a);
  imag = sqrt(-determinant)/(2*a);
  printf("Roots are: %.2f+%.2fi and %.2f-%.2fi", real, imag, real, imag);
 }
 return 0;
}

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