작은숲:위키노트/C 언어 예제/파일에서 문자 수 세기

<syntaxhighlight lang="c"> /**

* Copyright (c) 2001,2002 Yoon, Hyunho <hhyoon@kldp.org>
* http://mooo.org
* ----------------------------------------------------------------------
*
* LICENSE
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software 
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

1. include <stdio.h>
2. include <stdlib.h>
3. include <string.h>
4. define NUM_ALPA ('Z' - 'A' + 1)
5. define MAXLINE 256

int main(int argc, char *argv[]) { static int count[NUM_ALPA * 2] = { 0, };

   unsigned int i;
   char fn[MAXLINE], buffer[MAXLINE];
   FILE *fp;
   if (argc > 1)
       strcpy(fn, argv[1]);
   else
       strcpy(fn, "data266-2.txt");
   if ((fp = fopen(fn, "r")) == NULL) {
       printf("Cannot open the file: %s\n", fn);
       exit(0);
   }
   while (!feof(fp)) {
       if (fgets(buffer, MAXLINE, fp) == NULL) break;
       for (i = 0; i < strlen(buffer); i++) {
           if (buffer[i] >= 'a' && buffer[i] <= 'z')
               count[buffer[i] - 'a' + NUM_ALPA]++;
           else if (buffer[i] >= 'A' && buffer[i] <= 'Z')
               count[buffer[i] - 'A']++;
       }
   }
   fclose(fp);
   for (i = 0; i < NUM_ALPA * 2; i++) {
       if (count[i]) {
           if (i < NUM_ALPA)
               printf("%c: %d\n", 'A' + i, count[i]);
           else
               printf("%c: %d\n", 'a' + i - NUM_ALPA, count[i]);
       }
   }
   return 0;

}</source>

이 작은숲 문서의 출처는 위키노트의 위키노트/C 언어 예제/파일에서 문자 수 세기 문서입니다.