Thread: Help with this code.

[code]

THe value for PI can be determined by the series equation

PI= 4x (1-1/3+1/5-1/7+1/9-1/11+1/13-...)

write a program to approximate the value of PI using the formula given including terms up through 1/99.

I wrote this code but not sure what I am doing wrong. please some one help.

thanks

Code:

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

int
main(void)
{
double x, y, z, sum, pi, i, n;

sum = 1.0;
for (i = 0, y = 3.0; i < n; ++i, y += 2.0)
{
     z = 1.0 / y;
     if ((i & 1) == 0)
       sum -= z;
     else
       sum += z;
     }

     pi = 4.0 * sum;
}

Use integer for counter value (i,n).
Don't forget to initialize the values before use!

Code:

     pi = 4.0 * sum;

Isn't this line supposed to be outside loop?

Stop declaring all your variables on one line and give them all initial values.

I think you forgot to assign n something. So the loop is out of control. Who knows what else.

Originally Posted by Bayint Naung

Code:

     pi = 4.0 * sum;

Isn't this line supposed to be outside loop?

Isn't it already?

OOps , It's either my eye problem or indentation problem

No return.

Looks to me more like the user got the snippet from here. He's just trying to fill it out, because he has no clue how to write a program that's not complete and on the internet for him to copy.

Yeah, that post is from September 2008. Is this what passes for "I wrote this code" these days?