57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "utlist.h"
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#define BUFLEN 20
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typedef struct el {
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char bname[BUFLEN];
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struct el *next, *prev;
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} el;
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static int namecmp(void *_a, void *_b)
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{
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el *a = (el*)_a;
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el *b = (el*)_b;
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return strcmp(a->bname,b->bname);
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}
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int main()
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{
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el *name, *tmp;
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el *head = NULL;
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char linebuf[BUFLEN];
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FILE *file;
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file = fopen( "test11.dat", "r" );
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if (file == NULL) {
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perror("can't open: ");
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exit(-1);
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}
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while (fgets(linebuf,BUFLEN,file) != NULL) {
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name = (el*)malloc(sizeof(el));
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if (name == NULL) {
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exit(-1);
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}
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strcpy(name->bname, linebuf);
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DL_APPEND(head, name);
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}
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DL_SORT(head, namecmp);
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DL_FOREACH(head,tmp) {
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printf("%s", tmp->bname);
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}
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/* now delete the list head */
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printf("deleting head %shead->prev: %s", head->bname, head->prev->bname);
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DL_DELETE(head,head);
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DL_FOREACH(head,tmp) {
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printf("%s", tmp->bname);
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}
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fclose(file);
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return 0;
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}
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