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From: candycanearter07 <candycanearter07@candycanearter07.nomail.afraid>
Newsgroups: comp.os.linux.advocacy
Subject: Re: More Funny Stuff From Joel
Date: Wed, 12 Jun 2024 06:35:02 -0000 (UTC)
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DFS <nospam@dfs.com> wrote at 16:20 this Tuesday (GMT):
> On 6/10/2024 10:40 PM, candycanearter07 wrote:
>> DFS <nospam@dfs.com> wrote at 23:30 this Saturday (GMT):
>>> On 6/8/2024 5:32 PM, Joel wrote:
>>>
>>>> I can't imagine I'd need anything beyond C.
>>>
>>>
>>> I hope you're not gonna pull a Feeb and claim you're a C guru that can
>>> 'move the Earth', but refuse to show ANY decent code, then make lame
>>> excuses like "I have other fish to fry".
>> 
>> Seems like a fun challenge.. especially since im kinda rusty with c
>> 
>>> 1) write your own C to sort these 3 names (by last then first):
>>>
>>> William Thomas
>>> Zachary Jones
>>> Jim Thomas
>> 
>> I'll be honest, I might be bad but I completely forgot how to sort
>> strings.. sorry
>
>
> Usually qsort().
>
I knew there was an official implementation!
>
>>> 2) write your own C to count the words in:
>>>
>>> "Now is the time for all good men to come to the aid of their country."
>> 
>> #include <stdio.h>
>> #include <ctype.h>
>> 
>> const char phrase[] = "Now is the time for all good men to come to the
>> aid of their country.";
>> 
>> int main()
>> {
>> 	const char *phr = phrase;
>> 	int words = 0;
>> 	int space = 0;   // does c have bool?
>
> Yes.
>
>> 	while(*phr)
>> 	{
>> 		if(space && isalpha(*phr))
>> 		{
>> 			space = 0;
>> 			words++;
>> 		}
>> 		if(isblank(*phr)) space = 1;
>> 
>> 		phr++;
>> 	}
>> 
>> 	printf("Words: %d, words);
>> }
>
>
> My wordcounter code used:
>
>    if(isspace(myStr[i]) && !isspace(myStr[i+1])) {countWords++;}
>
> to also count words that might begin with numbers.
>
> "For the right money cola Linux 'advocates' would work 4MS in 2ms."
>
Right, I forgot isalnum was a thing.
>
>
>>> 3) write your own C to calc the mean, median and mode of:
>>>
>>> 1,2,3,4,5,5,6,7,8,9
>> 
>> #include <stdio.h>
>> #define COUNT_CNT 10
>> 
>> int nums[] = {1, 2, 3, 4, 5, 5, 6, 7, 8, 9, -1};
>> 
>> int main()
>> {
>> 	double mean;
>> 	int median, mode, md_count[COUNT_CNT], len;
>> 
>> 	for( len = 0; nums[len] != -1; len++ )
>> 	{
>> 		mean += nums[len];
>> 		md_count[nums[len]]++;
>> 	}
>> 	mean /= len;
>> 
>> 	if(len % 2 == 0)
>> 	{
>> 		int mid = len / 2;
>> 		median = nums[mid] + nums[mid + 1]];
>> 		median /= 2;
>> 	}
>> 	else
>> 		median = nums[len / 2];
>> 	
>> 	for( int i = 0; i < COUNT_CNT; i++ )
>> 	{
>> 		if(md_count[mode] < md_count[i]) mode = i;
>> 	}
>> 
>> 	printf("mean %g, median %d, mode %d", mean, median, mode);
>> }
>> 
>> These compiled fine on my machine (gcc 12.2.0)
>
>
> Did you actually run the code?

Yes, but I also typed it into slrn by hand bc I was worried that pasting
it would mess up word wrapping

> I got a segfault (WSL Ubuntu, gcc 11.4).  Had to make a few tweaks to 
> get it to run and provide correct answers.
>
> Do you want me to tell you what I did, or do you want to figure it out?
>
> Hint: after the line "mean /= len;" print out the contents of 
> md_count[].  You should get:
>
> 1. 1
> 2. 1
> 3. 1
> 4. 1
> 5. 2
> 6. 1
> 7. 1
> 8. 1
> 9. 1

I don't see it sorry ^^:

> I like the technique you use for the mode count, but something to 
> remember is there can be multiple modes, and your code as is will 
> identify only one.
>
> And the numbers were already sorted, but if they weren't you would have 
> to sort them - forward or reverse - before getting the median.

Thanks, I'll keep it in mind next time

>
>>> Why is it I have a VERY strong feeling you and Feeb and C are about to
>>> be pwned by python?
>> 
>> 
>> IMO, both are pretty good languages, with their own strengths..like, C
>> is good for dealing with the raw data and it can be really satisfying to
>> get everything working, and python is great for throwing something
>> together.
>
>
> I like them both, too.  But C is too time-consuming for me.  I just 
> don't spend enough time using it exclusively to be productive vs python.

Yeah, it can be frustrating sometimes (like how arrays don't really
exist and you have to be /very careful/ around them)

> Another language I've had my eye on is Julia.


Oh, never heard of it.
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