Thread: Quadratic Equation

This is my code:

Code:

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


int main(void)
{


float a,b,c,root_1,root_2;


printf("Please enter value a from the quadratic equation \n");
scanf("%f",&a);


printf("Please enter value b from the quadratic equation \n");
scanf("%f",&b);


printf("Please enter value c from the quadratic equation \n");
scanf("%f",&c);


double disc = pow(b,2) - 4*a*c;


if ((disc)>0)
{


root_1 = (-b + sqrt(disc))/(2*a);
root_2 = (-b - sqrt(disc))/(2*a);


printf("\n The first root is %.2f",root_1);
printf("\n The second root is %.2f",root_2);


}


else
{


printf("\n The roots are imaginary because the discriminant is negative!");


}


return 0;
}

And I keep getting this error:

Code:

/tmp/ccgtUIun.o: In function `main':
assign345.c:(.text+0xc7): undefined reference to `sqrt'
assign345.c:(.text+0xef): undefined reference to `sqrt'
collect2: ld returned 1 exit status

PLEASE HELP!!!

http://cboard.cprogramming.com/c-pro...ng-math-h.html

You need to link with the math library. Adding the compiler switch -lm works for most compilers

I dont understand, can you please show me?

How do I link with the math library??