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用C语言编通讯录程序（初学者级别的）(5) free(p);
break;
}
getstr(fp, &p->address);
getstr(fp, &p->zip);
getstr(fp, &p->phone);
make(h, p);
}
fclose(fp);
return h;
}
/* 从文件读入一行，并删除前导和尾随空白符后保存于堆空间 */
int getstr(FILE *rfp, char **s)
{
int len;
if ((len = getbuffer(rfp)) == 0) {
*s = NULL;
return 0;
}
*s = (char *)malloc(len+1);
strcpy(*s, buffer);
return len;
}
/* 从文件读入一行，并删除前导和尾随空白符后保存于buffer */
int getbuffer(FILE *rfp)
{
int len;
char *hp, *tp;
if (fgets(buffer, MAXLEN, rfp) == NULL)
return 0;
hp = buffer;
while(*hp == ' ' ¦¦ *hp == '\t')
hp++;
tp = hp + strlen(hp) - 1;
while (tp >= hp && (*tp == ' ' ¦¦ *tp == '\t' ¦¦ *tp == '\n'))
tp--;
*(tp+1) = '\0';
for(tp = buffer; *tp++ = *hp++;);
len = strlen(buffer);
return len;
}
/* 释放内存空间 */
void freeall(ADDR *head)
{
ADDR *p;
p = head->next;
free(head);
while (p != NULL) {
if (p->name != NULL)
free(p->name);
if (p->address != NULL)
free(p->address);
if (p->phone != NULL)
free(p->phone);
if (p->zip != NULL)
free(p->zip);
head = p->next;
free(p);
p = head;
}
}
void show( ADDR *ptr )
{
ADDR *p;
………………………………
TO BE CONTINUED…………
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