breaking apart an int
June 27, 2002 12:06 AM
Hi does anyone know of a way to take an int and break it down into its seperate numbers.
ex) int x = 1234;
I want to do something like
int y[4];
y[0] = 1;
y[1] = 2;
y[2] = 3;
y[3] = 4;
any help would be appreciated.
thanks
NextGenGamer
242
June 27, 2002 12:11 AM
I guess it wouldnt be the fastest way... but you could convert it to a string, separate it, then convert it back to int?
Simon
Simon
June 27, 2002 12:13 AM
Thats an idea im not too concerned with time at the time of this operation anyway since it is simply displaying the top 10 scores on screen
thanks for the idea though
Nextgengamer
thanks for the idea though
Nextgengamer
122
June 27, 2002 12:16 AM
char szText[10];
int iScore = 1230;
itoa(iScore, szText, 10);
szText will now contain the number as a string.
You can access it like your example szText[0], szText[1], etc..
[edited by - granat on June 27, 2002 1:17:49 AM]
int iScore = 1230;
itoa(iScore, szText, 10);
szText will now contain the number as a string.
You can access it like your example szText[0], szText[1], etc..
[edited by - granat on June 27, 2002 1:17:49 AM]
-------------Ban KalvinB !
122
June 27, 2002 12:21 AM
For C, look into
For C++, look into
/*=========================================*/
/* Chem0sh */
/* Lead Software Engineer & Tech Support */
/* http://www.eFaces.biz */
/*=========================================*/
[edited by - Chem0sh on June 27, 2002 1:22:19 AM]
sprintf For C++, look into
< sstream > (NOT < strstream > !) /*=========================================*/
/* Chem0sh */
/* Lead Software Engineer & Tech Support */
/* http://www.eFaces.biz */
/*=========================================*/
[edited by - Chem0sh on June 27, 2002 1:22:19 AM]
/*=========================================// Chem0sh// Lead Software Engineer & Tech Support// http://www.eFaces.biz=========================================*/
151
June 27, 2002 12:36 AM
You could also do it with some simple math if you want.
int num=1234;
int y[4];
int x=0;
int holder=1;
while(num!=0)
{
if(num%(holder*10)==0)
{
x++;
holder=holder*10;
}
num-=holder;
y[x]++;
}
should work.
int num=1234;
int y[4];
int x=0;
int holder=1;
while(num!=0)
{
if(num%(holder*10)==0)
{
x++;
holder=holder*10;
}
num-=holder;
y[x]++;
}
should work.
1,415
June 27, 2002 12:39 AM
quote: Original post by nextgengamer
Hi does anyone know of a way to take an int and break it down into its seperate numbers.
ex) int x = 1234;
I want to do something like
int y[4];
y[0] = 1;
y[1] = 2;
y[2] = 3;
y[3] = 4;
At first I wanted to say use left shifts, 4 bits for each digit, but that would only work in Hex. Consider how numbers are built
1234 = 1 * 1000 + 2 * 100 + 3 * 10 + 4 * 1
and work backwards from this - but if you''re seeking to display these number on screen, it''s probably best to use a string anyways.
"I thought what I'd do was, I'd pretend I was one of those deaf-mutes." - the Laughing Man
1,658
June 27, 2002 12:49 AM
quote: Original post by granat
itoa(iScore, szText, 10);
itoa is evil, non-standard, unportable and non typesafe.
quote: Original post by Chem0sh
For C++, look into <sstream> (NOT <strstream> !)
Or go there, grab Boost''s lexical_cast.hpp which does it for you.
#include <boost/lexical_cast.hpp>#include <string>using namespace std;using namespace boost;string s = lexical_cast<string>(1234); // cast to stringstring s = lexical_cast<string>(123.4); // cast to stringlong i = lexical_cast<long>("1234"); // cast to longfloat f = lexical_cast<float>("123.4") // cast to float And so on... You''ll admit it is a bit more intuitive.
Documents [ GDNet | MSDN | STL | OpenGL | Formats | RTFM | Asking Smart Questions ]
C++ Stuff [ MinGW | Loki | SDL | Boost. | STLport | FLTK | ACCU Recommended Books ]
"Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it." — Brian W. Kernighan
118
June 27, 2002 01:06 AM
umm, why not the simple portable way?
much easier since you can format everything nice like for pronting staright to the screen instead of having to offset stuff. ie names and scores will take only a single line and be printed correctly. this can be used for quake style console support if you add \n to your printed buffer and your text output system handles that sort of thing.
snprintf(outBuff, OUT_BUFF_SIZE, "%s %08d", playerName, playerScore); much easier since you can format everything nice like for pronting staright to the screen instead of having to offset stuff. ie names and scores will take only a single line and be printed correctly. this can be used for quake style console support if you add \n to your printed buffer and your text output system handles that sort of thing.
1,658
June 27, 2002 01:12 AM
quote: Original post by a person
snprintf(outBuff, OUT_BUFF_SIZE, "%s %08d", playerName, playerScore);
How about
#include <string>#include <sstream>#include <boost/format.hpp>using namespace std;using namespace boost;ostringstream ss;format frm( "%s %08d" );ss << frm % playerName % playerScore;string str = ss.str(); Yes, I admit it, I''m a Boost addict.
(Note: boost::format is still in beta)
Documents [ GDNet | MSDN | STL | OpenGL | Formats | RTFM | Asking Smart Questions ]
C++ Stuff [ MinGW | Loki | SDL | Boost. | STLport | FLTK | ACCU Recommended Books ]
"Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it." — Brian W. Kernighan
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