작은숲:위키노트/C 언어 예제/입력받은 값을 이진 파일에 저장

<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. define NUM 3

typedef struct rec { char name[20];

   int num;

} REC; void main() { int i, j;

   FILE *fp;
   REC stud[NUM];
      if ((fp = fopen("name.txt", "wb")) == NULL) {
       puts("Cannot open the file to write!");
       exit(1);
   }
   for (i = 0; i < NUM; i++) {
       scanf("%s %d", stud[i].name, &stud[i].num);
       fwrite(stud[i].name, sizeof(stud[i].name), 1, fp);
       fwrite(&stud[i].num, sizeof(stud[i].num), 1, fp);
   }
   
   fclose(fp); 
   if ((fp = fopen("name.txt", "rb")) == NULL) { 
       puts("Cannot open the file to read!");
       exit(1);
   }
   for (j = 0; j < i; j++) {
       if (fread(stud[j].name, sizeof(stud[j].name), 1, fp) != 1) break;
       if (fread(&stud[j].num, sizeof(stud[j].num), 1, fp) != 1) break;
       printf("%20s: %d\n", stud[j].name, stud[j].num);
   }
   fclose(fp);

}</source>

이 작은숲 문서의 출처는 위키노트의 위키노트/C 언어 예제/입력받은 값을 이진 파일에 저장 문서입니다.