StackOverflow2013

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plurals

PO
primarykey
Id
6599260
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
3
CommunityOwnedDate
CreationDate
2011-07-06T15:44:46.237
FavoriteCount
0
LastActivityDate
2011-07-06T16:00:56.510
LastEditDate
2011-07-06T16:00:56.510
LastEditorUserId
824929
OwnerUserId
824929
ParentId
6598013
PostTypeId
2
Score
1
ViewCount
0
LastEditorDisplayName
text
Body
<p>This works for me.</p> <pre><code>//gcc c2.c -std=c99 -g -Wall -Wextra #include <stdio.h> #include <malloc.h> #include <assert.h> typedef struct pgm_type pgm_type; struct pgm_type{ char filetype[2]; int width,height,maxgray; unsigned char*p; }; int readpgm (pgm_type * header, char*fn) { FILE *instream; int size, read; instream = fopen (fn,"rb"); assert(instream); fscanf (instream, "%2s%d%d%d", header->filetype, &header->width, &header->height, &header->maxgray); printf("%2s %d %d %d\n",header->filetype,header->width, header->height,header->maxgray); if (!header->filetype[0] == 'P' || !header->filetype[1] == '5') { printf ("Incorrect Type"); } size = header->width * header->height; header->p = malloc (size * sizeof (char)); read = fread (header->p, 1, size, instream); if (read != size) { printf ("Incorrect Size"); } return size; } void printFile (int x1, int x2, int y1, int y2,pgm_type * header, char*fn) { FILE *outstream; int wide=x2-x1+1,high=y2-y1+1; printf("cropping to %dx%d\n",wide,high); outstream = fopen (fn, "wb"); assert (outstream); fprintf (outstream, "%2s\n%i %i\n%i\n", header->filetype, wide, high, header->maxgray); unsigned char image[header->height][header->width]; unsigned char *pix = malloc ((wide * high) * sizeof (char)); int a = 0; for (int b = 0; b < header->height; ++b) { for (int c = 0; c < header->width; ++c) { image[b][c] = header->p[a]; ++a; } } int k = 0; for (int j = y1; j <= y2; ++j) { for (int i = x1; i <= x2; ++i) { pix[k] = image[j][i]; ++k; } } fwrite (pix, wide,high, outstream); free (pix); fclose (outstream); } int main() { pgm_type h; readpgm(&h,"lena.pgm"); printFile(64,129,32,230,&h,"o2.pgm"); return 0; } </code></pre>
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Title
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1. This table or related slice is empty.
PostParentId
1. POModulization Gone Awry
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  PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USwhoplisp
UserOwnerUserId
1. USwhoplisp
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PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. POModulization Gone Awry
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1. This table or related slice is empty.
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1. VO
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2. VO
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