Programing C

beanryu

I wrote the following "program"

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


int main()
{
double x,y;

printf("enter a number");
scanf("%FL,&x_one");


y = pow(x,3.0) - 4.0*x + 1.0;
printf("%d",y);

return 0;

}

could anyone tell me why I can't get a correct result from this?
What had I done wrong with the pow(power) operation?
THANX!

chroot

The line

scanf("%FL,&x_one");

doesn't make any sense. Did you put the quote marks in the wrong place? Did you mean:

scanf("%FL", &x_one);

Of course, the variable x_one doesn't exist in your program, and you probably should use lowercase characters in your scanf -- like "%fl".

- Warren

beanryu

even I corrected the errors you pointed out to me...

i can't get any other result but the degit "0"!
I use miracle C to compile it.

corrected program:
#include <stdio.h>
#include <math.h>


int main()
{
double x,y;

printf("enter a number");
scanf("%fl",&x);


y = pow(x,3.0) - 4.0*x + 1.0;
printf("%d",y);

return 0;

}

I think the "pow" function is not being recognized...
whatever vulue I enter in the parathesis after pow function, it returns 1!

neutrino

Is %fl allowed in C at all? I know %f is.

beanryu

my text book said yes, its a must in a scanf() thing

the thing is the program works fine when its

y = x*3.0) - 4.0*x + 1.0
or y = x-3.0 - 4.0*x + 1.0
or whatever other thing I tried

just not pow(x,3.0)

Hurkyl

I thought it was %lf, not %fl.

Anyways, did you remember to link your program with the math library, when you compiled it?

gerben

If you change your scanf and your printf statements to thisit should work (I tried it, and it works fine)