Indirection?

[Randy]

I get an error when I try to compile my program. It says that "Indirection must be through a pointer". I have not a clue as to what that means. The code:

[code:3t00n8nz]#include <stdio.h>

#define PI 3.1415

main()
{
   float radius, area;

   printf("Enter the radius:\n");
   scanf("%1f", &radius);

   area = PI * radius ** 2;
   printf("Area of circle with radius %f is: ", radius, area);
}

[/code:3t00n8nz]

Operating system is HP-UX 10.20. Thanks In Advance.

[Anonymous]

area = PI * radius * 2; /*delete the extra * and try again.  If thats correct then good but if not email me back and we'll try again*/
 

[Randy]

The formula for area is PI times the radius squared. If I knock off the extra '*', wouldn't that just denote simple multiplication rather than exponentiation? Thanks for the reply. :)

[Anonymous]

[quote:4mia8x59]If I knock off the extra '*', wouldn't that just denote simple multiplication rather than exponentiation? Thanks for the reply. [/quote]

your right!  It would be more like PI * (rad * rad)

What your saying is PI * rad* * 2; not right because the complier thinks its a *p=pointer
 

[Mr. Cool]

[quote:ymketm1m]It would be more like PI * (rad * rad)
[/quote]
I believe thats right too

[Randy]

OK, thanks. I changed it. I know nothing of pointers just yet. :)

[Anonymous]

[quote:3vxbwxt0]I know nothing of pointers just yet. [/quote]
Try this website to learn more. type in c progranmming at [/url]www.howstuffworks.com " target="_blank">http://Have a wonderful day

[Randy]

Thanks, I'll check it out. I am reading K&R right now, but it's kind of dense for a tutorial. ;)