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Post History
1 - Rearrange the code: Open stdin, read all parameters, close stdin, then process the parameters. 2 - Consider adding some validation to the parameters. 3 - Add an explanation of the magic number ...
Answer
#2: Post edited
by
manassehkatz
·
2020-10-28T03:49:42Z (about 4 years ago)
- 1 - Rearrange the code: Open stdin, read all parameters, close stdin, then process the parameters.
- 2 - Consider adding some validation to the parameters.
- 3 - Add an explanation of the magic number 6378137 - I had to Google it to find out what it means.
- 4 - Replace $i = 45, $i += 90 and the for statement with:
- <pre>
- for ($i = 45; $i <= 405; $i += 90) {
- </pre>
- Which actually doesn't look right. Is it supposed to be $loop <= 4, which turns into $i = 405? Or should it be < 4 which would have the last $i = 315?
5 - Assign cos($d_rad) and sin($d_rad) to variables outside the loop instead of calculating them repeatedly.
- 1 - Rearrange the code: Open stdin, read all parameters, close stdin, then process the parameters.
- 2 - Consider adding some validation to the parameters.
- 3 - Add an explanation of the magic number 6378137 - I had to Google it to find out what it means.
- 4 - Replace $i = 45, $i += 90 and the for statement with:
- <pre>
- for ($i = 45; $i <= 405; $i += 90) {
- </pre>
- Which actually doesn't look right. Is it supposed to be $loop <= 4, which turns into $i = 405? Or should it be < 4 which would have the last $i = 315?
- 5 - Assign cos($d_rad), sin($d_rad), sin($lat) and cos($lat) to variables outside the loop instead of calculating them repeatedly.
#1: Initial revision
by
manassehkatz
·
2020-10-28T02:01:50Z (about 4 years ago)
1 - Rearrange the code: Open stdin, read all parameters, close stdin, then process the parameters.
2 - Consider adding some validation to the parameters.
3 - Add an explanation of the magic number 6378137 - I had to Google it to find out what it means.
4 - Replace $i = 45, $i += 90 and the for statement with:
<pre>
for ($i = 45; $i <= 405; $i += 90) {
</pre>
Which actually doesn't look right. Is it supposed to be $loop <= 4, which turns into $i = 405? Or should it be < 4 which would have the last $i = 315?
5 - Assign cos($d_rad) and sin($d_rad) to variables outside the loop instead of calculating them repeatedly.