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Groups > comp.lang.c > #127701
| From | Anton Shepelev <anton.txt@gmail.com> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Copy array with small changes |
| Date | 2018-03-12 22:36 +0300 |
| Organization | A noiseless patient Spider |
| Message-ID | <20180312223630.d98ceb13d25ca3a2d094c913@gmail.com> (permalink) |
| References | <p848dh$oko$1@dont-email.me> |
Noob:
> void update_array(int *arr, int n, int zi, int zj, int val)
> {
> int new_arr[N];
> int i, j = 0, done = 0;
>
> for (i = 0; i < n; +i)
> {
> if (i == zi || i == zj) continue;
> int tmp = arr[i];
> if (!done && val < tmp) {
> new_arr[j++] = val;
> done = 1;
> }
> new_arr[j++] = tmp;
> }
> new_arr[j] = val;
> do_something(new_arr);
> }
> It's ugly IMO.
Does the performace gain countervail the ugliness?
#include<stdio.h>
static void doit( int a[], int n )
{ int i;
for( i = 0; i < n; i = i + 1 )
{ printf( "%i ", a[ i ] ); }
printf("\n");
}
static void proc_array( int a[], int n, int ix1, int ix2, int inc )
{ int i, added, pos, scanned;
int b[ n - 1 ];
added = 0;
scanned = 0;
pos = 0;
for( i = 0;; i++ )
{ if( i == ix1 || i == ix2 )
{ continue;
}
scanned = i == n;
if( !added && (scanned || inc < a[i] ) )
{ b[ pos++ ] = inc;
added = 1;
}
if( scanned )
{ break; }
b[ pos++ ] = a[ i ];
}
doit( b, n - 1 );
}
int main( int argc, char** argv )
{ int a[] = {0,2,4,6,8,10};
proc_array( a, 6, 2, 4, 9 );
}
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Copy array with small changes Noob <root@127.0.0.1> - 2018-03-11 22:51 +0100
Re: Copy array with small changes supercat@casperkitty.com - 2018-03-11 15:11 -0700
Re: Copy array with small changes Richard Damon <Richard@Damon-Family.org> - 2018-03-11 18:12 -0400
Re: Copy array with small changes Spiros Bousbouras <spibou@gmail.com> - 2018-03-11 22:35 +0000
Re: Copy array with small changes Richard Damon <Richard@Damon-Family.org> - 2018-03-13 13:10 -0400
Re: Copy array with small changes Spiros Bousbouras <spibou@gmail.com> - 2018-03-11 22:13 +0000
Re: Copy array with small changes Spiros Bousbouras <spibou@gmail.com> - 2018-03-12 00:04 +0000
Re: Copy array with small changes bartc <bc@freeuk.com> - 2018-03-12 10:35 +0000
Re: Copy array with small changes Spiros Bousbouras <spibou@gmail.com> - 2018-03-12 12:37 +0000
Re: Copy array with small changes bartc <bc@freeuk.com> - 2018-03-12 13:10 +0000
Re: Copy array with small changes Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-03-12 13:34 +0000
Re: Copy array with small changes Tim Rentsch <txr@alumni.caltech.edu> - 2018-03-17 09:22 -0700
Re: Copy array with small changes mark.bluemel@gmail.com - 2018-03-12 07:47 -0700
Re: Copy array with small changes bartc <bc@freeuk.com> - 2018-03-12 14:56 +0000
Re: Copy array with small changes Spiros Bousbouras <spibou@gmail.com> - 2018-03-12 15:14 +0000
Re: Copy array with small changes mark.bluemel@gmail.com - 2018-03-12 08:53 -0700
Re: Copy array with small changes Keith Thompson <kst-u@mib.org> - 2018-03-12 09:08 -0700
Re: Copy array with small changes supercat@casperkitty.com - 2018-03-12 09:57 -0700
Re: Copy array with small changes Richard Damon <Richard@Damon-Family.org> - 2018-03-13 13:21 -0400
Re: Copy array with small changes Noob <root@127.0.0.1> - 2018-03-12 15:25 +0100
Re: Copy array with small changes Spiros Bousbouras <spibou@gmail.com> - 2018-03-12 15:09 +0000
Re: Copy array with small changes Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-03-12 06:59 +0000
Re: Copy array with small changes Noob <root@127.0.0.1> - 2018-03-12 15:55 +0100
Re: Copy array with small changes bartc <bc@freeuk.com> - 2018-03-12 15:07 +0000
Re: Copy array with small changes mark.bluemel@gmail.com - 2018-03-12 09:03 -0700
Re: Copy array with small changes Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-03-12 17:42 +0000
Re: Copy array with small changes Noob <root@127.0.0.1> - 2018-03-12 23:33 +0100
Re: Copy array with small changes Wouter Verhelst <w@uter.be> - 2018-03-12 23:44 +0100
Re: Copy array with small changes Tim Rentsch <txr@alumni.caltech.edu> - 2018-03-17 09:48 -0700
Re: Copy array with small changes Steven Petruzzellis <frelwizzen@gmail.com> - 2018-03-18 03:31 -0700
Re: Copy array with small changes Noob <root@127.0.0.1> - 2018-03-22 17:10 +0100
Re: Copy array with small changes Tim Rentsch <txr@alumni.caltech.edu> - 2018-03-17 09:24 -0700
Re: Copy array with small changes Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-03-17 18:04 +0000
Re: Copy array with small changes Tim Rentsch <txr@alumni.caltech.edu> - 2018-03-26 22:55 -0700
Re: Copy array with small changes Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-03-27 15:28 +0100
Re: Copy array with small changes Steven Petruzzellis <frelwizzen@gmail.com> - 2018-03-28 14:42 -0700
Re: Copy array with small changes Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-03-13 12:46 +0000
Re: Copy array with small changes Anton Shepelev <anton.txt@gmail.com> - 2018-03-12 22:36 +0300
Re: Copy array with small changes Wouter Verhelst <w@uter.be> - 2018-03-12 23:32 +0100
Re: Copy array with small changes Wouter Verhelst <w@uter.be> - 2018-03-13 10:42 +0100
Re: Copy array with small changes Noob <root@127.0.0.1> - 2018-03-13 11:37 +0100
Re: Copy array with small changes Wouter Verhelst <w@uter.be> - 2018-03-13 21:27 +0100
Re: Copy array with small changes Tim Rentsch <txr@alumni.caltech.edu> - 2018-03-17 09:55 -0700
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