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Consumer* read_list()
{
FILE *fp;
if ((fp = fopen("CONSUMER.dat", "rb")) == NULL)
{
printf("无法读取 CONSUMER.dat\n");
return NULL;
}
int sign;
Consumer *s,*p,*head;
head= (Consumer*)malloc(SIZE_C);
if (head == NULL)
{
printf("读取失败!内存空间申请不足!\n");
return NULL;
}
fseek(fp, 0, SEEK_END);
if (ftell(fp) == 0)
{
return NULL;
}
p = head;
p->next = NULL;
while (feof(fp))
{
s = (Consumer*)malloc(SIZE_C);
fread(s, SIZE_C, 1, fp);
p->next = s;
p = s;
p->next = NULL;
}
fclose(fp);
return head;
}//读取文件到链表
int save_consumer(Consumer *p)
{
FILE *fp;
Consumer *head;
head = p;//p为已经构建好的链表
if ((fp = fopen("CONSUMER.dat", "ab+")) == NULL)
{
printf("无法打开 CONSUMER.dat!\n");
return -1;
}
while (p != NULL)
{
fwrite(p, SIZE_C, 1, fp);
p = p->next;
}
fclose(fp);
return 1;
}//储存链表到文件
#include <stdio.h>
#include <string.h>
FILE *f;
char buffer[4096];
int r,a;
void HexDump(char *buf,int len,int addr) {
int i,j,k;
char binstr[80];
for (i=0;i<len;i++) {
if (0==(i%16)) {
sprintf(binstr,"%08x -",i+addr);
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
} else if (15==(i%16)) {
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
sprintf(binstr,"%s ",binstr);
for (j=i-15;j<=i;j++) {
sprintf(binstr,"%s%c",binstr,('!'<buf[j]&&buf[j]<='~')?buf[j]:'.');
}
printf("%s\n",binstr);
} else {
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
}
}
if (0!=(i%16)) {
k=16-(i%16);
for (j=0;j<k;j++) {
sprintf(binstr,"%s ",binstr);
}
sprintf(binstr,"%s ",binstr);
k=16-k;
for (j=i-k;j<i;j++) {
sprintf(binstr,"%s%c",binstr,('!'<buf[j]&&buf[j]<='~')?buf[j]:'.');
}
printf("%s\n",binstr);
}
}
int main(int argc,char **argv) {
if (argc<2) {
fprintf(stderr,"Usage: %s filename.ext\n",argv[0]);
return 2;
}
f=fopen(argv[1],"rb");
if (NULL==f) {
fprintf(stderr,"Can not open file [%s]!\n",argv[1]);
return 1;
}
a=0;
while (1) {
r=fread(buffer,1,4096,f);
HexDump(buffer,r,a);
a+=r;
if (r<4096) break;
}
fclose(f);
return 0;
}
[/quote]
哦, 谢谢赵老师#include <stdio.h>
#include <string.h>
FILE *f;
char buffer[4096];
int r,a;
void HexDump(char *buf,int len,int addr) {
int i,j,k;
char binstr[80];
for (i=0;i<len;i++) {
if (0==(i%16)) {
sprintf(binstr,"%08x -",i+addr);
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
} else if (15==(i%16)) {
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
sprintf(binstr,"%s ",binstr);
for (j=i-15;j<=i;j++) {
sprintf(binstr,"%s%c",binstr,('!'<buf[j]&&buf[j]<='~')?buf[j]:'.');
}
printf("%s\n",binstr);
} else {
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
}
}
if (0!=(i%16)) {
k=16-(i%16);
for (j=0;j<k;j++) {
sprintf(binstr,"%s ",binstr);
}
sprintf(binstr,"%s ",binstr);
k=16-k;
for (j=i-k;j<i;j++) {
sprintf(binstr,"%s%c",binstr,('!'<buf[j]&&buf[j]<='~')?buf[j]:'.');
}
printf("%s\n",binstr);
}
}
int main(int argc,char **argv) {
if (argc<2) {
fprintf(stderr,"Usage: %s filename.ext\n",argv[0]);
return 2;
}
f=fopen(argv[1],"rb");
if (NULL==f) {
fprintf(stderr,"Can not open file [%s]!\n",argv[1]);
return 1;
}
a=0;
while (1) {
r=fread(buffer,1,4096,f);
HexDump(buffer,r,a);
a+=r;
if (r<4096) break;
}
fclose(f);
return 0;
}
[/quote]
哦, 谢谢赵老师#include <stdio.h>
#include <string.h>
FILE *f;
char buffer[4096];
int r,a;
void HexDump(char *buf,int len,int addr) {
int i,j,k;
char binstr[80];
for (i=0;i<len;i++) {
if (0==(i%16)) {
sprintf(binstr,"%08x -",i+addr);
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
} else if (15==(i%16)) {
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
sprintf(binstr,"%s ",binstr);
for (j=i-15;j<=i;j++) {
sprintf(binstr,"%s%c",binstr,('!'<buf[j]&&buf[j]<='~')?buf[j]:'.');
}
printf("%s\n",binstr);
} else {
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
}
}
if (0!=(i%16)) {
k=16-(i%16);
for (j=0;j<k;j++) {
sprintf(binstr,"%s ",binstr);
}
sprintf(binstr,"%s ",binstr);
k=16-k;
for (j=i-k;j<i;j++) {
sprintf(binstr,"%s%c",binstr,('!'<buf[j]&&buf[j]<='~')?buf[j]:'.');
}
printf("%s\n",binstr);
}
}
int main(int argc,char **argv) {
if (argc<2) {
fprintf(stderr,"Usage: %s filename.ext\n",argv[0]);
return 2;
}
f=fopen(argv[1],"rb");
if (NULL==f) {
fprintf(stderr,"Can not open file [%s]!\n",argv[1]);
return 1;
}
a=0;
while (1) {
r=fread(buffer,1,4096,f);
HexDump(buffer,r,a);
a+=r;
if (r<4096) break;
}
fclose(f);
return 0;
}
Consumer* read_list()
{
FILE *fp;
if ((fp = fopen("CONSUMER.dat", "rb")) == NULL)
{
printf("无法读取 CONSUMER.dat\n");
return NULL;
}
int sign;
Consumer *s,*p,*head;
head= (Consumer*)malloc(SIZE_C);
if (head == NULL)
{
printf("读取失败!内存空间申请不足!\n");
return NULL;
}
fseek(fp, 0, SEEK_END);
if (ftell(fp) == 0)
{
return NULL;
}
p = head;
p->next = NULL;
while (feof(fp))
{
s = (Consumer*)malloc(SIZE_C);
//fread(s, SIZE_C, 1, fp);
fread(s, sizeof(char), SIZE_C, fp);
p->next = s;
p = s;
p->next = NULL;
}
fclose(fp);
return head;
}//读取文件到链表
int save_consumer(Consumer *p)
{
FILE *fp;
Consumer *head;
head = p;//p为已经构建好的链表
//if ((fp = fopen("CONSUMER.dat", "ab+")) == NULL)
if ((fp = fopen("CONSUMER.dat", "wb")) == NULL)
{
printf("无法打开 CONSUMER.dat!\n");
return -1;
}
while (p != NULL)
{
//fwrite(p, SIZE_C, 1, fp);
fwrite(p, sizeof(char), SIZE_C, fp);
p = p->next;
}
fclose(fp);
return 1;
}//储存链表到文件
/*************************************************************************
> File Name: test3.c
> Author: jukay
> Mail: hellojukay@163.com
> Created Time: 2014年12月18日 星期四 19时29分18秒
************************************************************************/
#include<stdio.h>
#include<stdlib.h>
struct date
{
char str[3];
struct date *next;
};
//链表长度为len
struct date *create_link(int len)
{
struct date *head;
struct date *tmp;
int i;
head = malloc(sizeof(struct date));
tmp = head;
for(i = 1; i < len; ++i)
{
head ->next = malloc(sizeof(struct date));
head = head ->next;
}
head ->next = NULL;
return tmp;
}
//读文件到链表
void read_file_to_link(struct date *head,FILE *fp)
{
if(head == NULL || fp == NULL)
{
fprintf(stderr,"null pointer");
exit(EXIT_FAILURE);
}
do
{
fscanf(fp,"%3s",head ->str);
head = head ->next;
}while(head != NULL);
}
//显示链表中的内容
void print_link(struct date *head)
{
if(head == NULL)
{
fprintf(stderr,"null pointer");
exit(EXIT_FAILURE);
}
do
{
printf("%s",head ->str);
head = head ->next;
}while(head != NULL);
}
int main()
{
FILE *fp;
int len; //链表长度
scanf("%d",&len);
fp = fopen("a.txt","r");
struct date *head;
head = create_link(len);
read_file_to_link(head,fp);
print_link(head);
exit(EXIT_SUCCESS);
}