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Programs in C language

13. To find the roots of a quadratic equation.

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

void main()
{
float a,b,c,root1,root2;
clrscr();
printf("\n Enter values of a,b,c for finding roots of a quadratic eq:\n");
scanf("%f%f%f",&a,&b,&c);

if(b*b>4*a*c)
{
 root1=-b+sqrt(b*b-4*a*c)/2*a;
 root2=-b-sqrt(b*b-4*a*c)/2*a;
 printf("\n root1=%f\n root2=%f",root1,root2);
}
else
 printf("\n Imaginary Roots.");
 getch();
}
Input
a = 4, b = 5, c = 1
Output
-1, -0.25
Father of C Language
Dennis Ritchie

Dennis Ritchie

Born: September 9, 1941, Bronxville
Died: October 9, 2011, Murray Hill
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