hi!every one !

[jim]

i am new to c and turboc.
and i am learning it .
i hope you can help me .
thanks .

 

[jim]

#include<stdio.h>
#include<math.h>
void main()
{
float x,y,z;
scanf("%f,%f\n",&x,&y) ;

z=(fabs(x)-2)*(fabs(x)-2)+(fabs(y)-2)*(fabs(y)-2)-1;


if(z<=1e-6)
{
printf("the height of the dot is 10 m .\n");
}
else


printf("the height of the dot is 0 m .\n");



}
i wote it,but it can not run rightly!
would u tell me what is wrong with it ?
thanks

 

[pemo]

#include<stdio.h>
#include<math.h>
void main()
{
float x,y,z;
scanf("%f,%f\n",&x,&y) ;

z=(fabs(x)-2)*(fabs(x)-2)+(fabs(y)-2)*(fabs(y)-2)-1;


if(z<=1e-6)
{
printf("the height of the dot is 10 m .\n");
}
else


printf("the height of the dot is 0 m .\n");



}
i wote it,but it can not run rightly!
would u tell me what is wrong with it ?
thanks

Which inputs do you expect to produce which outputs? What is the code
trying to solve for you?

 

[Richard Heathfield]

jim said:

#include<stdio.h>
#include<math.h>
void main()

main returns int, not void. So make that:

int main(void)

{
float x,y,z;
scanf("%f,%f\n",&x,&y) ;

scanf returns a value, which you need to check, in case something went
wrong.

z=(fabs(x)-2)*(fabs(x)-2)+(fabs(y)-2)*(fabs(y)-2)-1;

What is this supposed to do? Let's assume that x has the value 3.0, and y
has the value 4.0.

fabs(3.0) is 3.0.

fabs(3.0) - 2 is 1.0.

(fabs(3.0) - 2) * (fabs(3.0) - 2) is 1.0.

fabs(4.0) is 4.0.

fabs(4.0) - 2 is 2.0.

(fabs(4.0) - 2) * (fabs(4.0) - 2) is 4.0.

(fabs(3.0) - 2) * (fabs(3.0) - 2) + (fabs(4.0) - 2) * (fabs(4.0) - 2) is
5.0.

(fabs(3.0) - 2) * (fabs(3.0) - 2) + (fabs(4.0) - 2) * (fabs(4.0) - 2) - 1 is
4.0.

So z takes the value 4.0.

Is that what you were expecting?

if(z<=1e-6)
{
printf("the height of the dot is 10 m .\n");
}
else


printf("the height of the dot is 0 m .\n");

main returns int, so add:

return 0;

}
i wote it,but it can not run rightly!

What do you mean by "run rightly"? What is it supposed to do?

 

[Vladimir S. Oka]

i am new to c and turboc.
and i am learning it .
i hope you can help me .

And your question was? Once you have one, you're more than welcome to
post it here. Before you do, please read and heed:
<http://cfaj.freeshell.org/google/>. This one
<http://clc-wiki.net/wiki/Introduction_to_comp.lang.c> is also useful
if you want to avoid friction with the regulars.

 

[Robin Haigh]

#include<stdio.h>
#include<math.h>
void main()
{
float x,y,z;
scanf("%f,%f\n",&x,&y) ;

[snip]

Your problem might just be the scanf format. scanf is very picky, not easy
to master, and possibly not worth it. For now though, changing the format
to just "%f%f" might do what you want

 

[Rod Pemberton]

#include<stdio.h>
#include<math.h>
void main()
{
float x,y,z;
scanf("%f,%f\n",&x,&y) ;

[snip]

Your problem might just be the scanf format. scanf is very picky, not easy
to master, and possibly not worth it. For now though, changing the format
to just "%f%f" might do what you want

Nice call. With a TTF, I can't even see that comma...

RP

 

[jim]

thank u very much
and i have knewn what is wrong with it