Problem with dividing two integers

Problem with dividing two integers - Printable Version

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+--- Thread: Problem with dividing two integers (/showthread.php?tid=597632)

Problem with dividing two integers - vannesenn - 02.01.2016

Hi guys,
I have problem with dividing two integers. I don't remember I had that problem before :S
So, in main() I added simple printf for check

Код:

main()
{
	print(">>> SUSTAV POKRENUT");
	print("- Inacica skripte: "_HRP_SRVSETT_VR_L".");
	print("- Zadnje azuriranje: "_HRP_SRVSETT_LSTUP" godine.");
	print("- Kodno ime skripte: "_HRP_SRVSETT_CNAME_VR".");
	print("- Kodno ime azuriranja: "_HRP_SRVSETT_CNAME_UPD".");
	print("- Zahvale: "_HRP_SVRSETT_CRDS".");
	print("- Web adresa zajednice: "_HRP_SVRSETT_WEB".");
	print("- Klijent inacica: "_HRP_SVRSETT_CLN_VR".");
	print("- Server posluzitelj: "_HRP_SVRSETT_SRVHST".");
	print("- Web posluzitelj: "_HRP_SVRSETT_WEBHST".");
	print("- e-Mail zajednice: "_HRP_SVRSETT_MAIL".");
	print(" ");

	printf("%.2f", 5 / 2);
}

After I've compiled script and started the server, result was '0.00'. I'm not sure why I have this problem, I thought it was because I'm using rBits but it wasn't.
Also, if I divide two float numbers(eg. 5.5 / 2.

I got right result. Same thing with dividing float with int and int with float values.
Problem is dividng with two int values but I don't Know where's a problem. I tried without includes I use and I got same problem.

Код:

// GLAVNI INCLUDEOVI
#include 															<a_samp>
#include 															<crashdetect>

	
// ****** ZBIRKA
#include															<YSI\y_timers>
#include 															<YSI\y_va>
#include 															<YSI\y_hooks>

// OSTALI INCLUDOVI
#include 															<a_mysql>
#define 															USE_OPTIMAL_MODE
#include 															<new_funcs>
#include 															<rBits>
#include 															<easyDialog>
#include 															<randomFloat>
#include 															<streamer>
#include 															<sscanf2> 
#include 															<LIFE-CMD>
#include                                            				<e-Mail>
#include 															<CTime>

I've tried with

Код:

	new Float:_var = (5 / 2);
	printf("%.2f", _var);

And it gave me 2.00(like I wrote 5 % 2)
Thank You guys very much.

Re: Problem with dividing two integers - Nero_3D - 02.01.2016

If you use arithmetic with different data types the "weaker" data type will be converted

Now if you divide a Float with an Integer, the Integer will be converted to a Float, resulting in a Float
But if you do a simple Integer division you get as result an integer

PHP код:



printf("%f", 5.0 / 2.0); // float / float = float => 2.5

printf("%f", 5.0 / 2); // float / int = float / float(int) = float => 2.5

printf("%f", 5 / 2.0); // int / float = float(int) / float = float => 2.5

printf("%d", 5 / 2); // int / int = int => 2 (the .5 gets chopped away)

Re: Problem with dividing two integers - vannesenn - 02.01.2016

Quote:

Originally Posted by Nero_3D

If you use arithmetic with different data types the "weaker" data type will be converted

Now if you divide a Float with an Integer, the Integer will be converted to a Float, resulting in a Float
But if you do a simple Integer division you get as result an integer

PHP код:



printf("%f", 5.0 / 2.0); // float / float = float => 2.5

printf("%f", 5.0 / 2); // float / int = float / float(int) = float => 2.5

printf("%f", 5 / 2.0); // int / float = float(int) / float = float => 2.5

printf("%d", 5 / 2); // int / int = int => 2 (the .5 gets chopped away)

Wait, but I got 0.00 instead 2. And why I can't 5 print like 5.00? I don't remember I can't do like that before.

It Works with this code

Код:

printf("%.2f", float(5) / float(2));

Re: Problem with dividing two integers - Nero_3D - 02.01.2016

Quote:

Originally Posted by vannesenn

Wait, but I got 0.00 instead 2. And why I can't 5 print like 5.00? I don't remember I can't do like that before.

It Works with this code

Код:

printf("%.2f", float(5) / float(2));

Did you look at my code, if you do Int / Int you get as result an Int, thus you need to use %d / %i not %f
Also what you were looking for would be the first line "printf("%f", 5.0 / 2.0);", if you add a .0 to the number you declare them as float

PHP код:



printf("%f", 5); // %f - float but the given parameter "5" is an integer => unknown result

printf("%f", 5.0); // correct

printf("%d", 5.0); // wrong

printf("%d", 5); // correct

Re: Problem with dividing two integers - vannesenn - 02.01.2016

Well, okey. Very weird problem... Are these rules exist from begin or they are something new?

Re: Problem with dividing two integers - Vince - 02.01.2016

It is like that in every language that has different data types and it's nothing new. Integer divided by integer remains integer. Any would-be fractional part is discarded.

Re: Problem with dividing two integers - vannesenn - 02.01.2016

Quote:

Originally Posted by Vince

It is like that in every language that has different data types and it's nothing new. Integer divided by integer remains integer. Any would-be fractional part is discarded.

I Know that only for C++ but not for PAWN because I thought it supports int / int = float
Whatever, thanks guys for help.