手机存储系统
#include
#include
#include
void createHeadNode();
void savePhone(struct node* phead);
void listPhone(struct node* phead);
void infoOutput(struct node* pfind);
void createFace();
void deletePhone(struct node* phead);
void getPhone(struct node* phead);
void updatePhone(struct node* phead);
struct node* findTheNode(struct node* head, char input[]);
struct Phone {
char phoneNum[20];
char brand[30];
char phoneName[30];
float price;
int num;
};
struct node {
struct Phone data;
struct node* pnext;
};
struct node* phead = NULL;
int main() {
createHeadNode();
createFace();
return 0;
}
void createHeadNode() {
phead = (struct node*)malloc(sizeof(struct node));
if (!phead) {
printf("头节点分配失败\n");
return;
}
phead->pnext = NULL;
}
void createFace(){
int select = 0;
printf("\t\t\t欢迎使用手机库存管理系统\n");
printf("1:添加手机一条信息\n");
printf("2:删除手机一条信息\n");
printf("3:查找手机一条信息\n");
printf("4:修改手机一条信息\n");
printf("5:显示手机一条信息\n");
printf("6:按照手机价格排序\n");
printf("7:学生数据存档\n");
while (1) {
scanf("%d", &select);
switch (select) {
case 1:savePhone(phead); break;
case 2:deletePhone(phead); break;
case 3:getPhone(phead); break;
case 4:updatePhone(phead); break;
case 5:listPhone(phead); break;
case 6:break;
case 7:break;
}
}
}
void savePhone(struct node* phead) {
struct node* pnew = NULL;
struct node* pfind = phead;
while (pfind->pnext!=NULL) {
pfind = pfind->pnext;
}
pnew = (struct node*)malloc(sizeof(struct node));
printf("请输入手机编号\n");
scanf("%s", pnew->data.phoneNum);
printf("请输入手机品牌\n");
scanf("%s", pnew->data.brand);
printf("请输入手机名称\n");
scanf("%s", pnew->data.phoneName);
printf("请输入手机价格\n");
scanf("%s", &pnew->data.price);
printf("请输入手机数量\n");
scanf("%s", &pnew->data.num);
pnew->pnext = NULL;
pfind->pnext = pnew;//pnew是最后一个节点
pfind = pfind->pnext;//向后移动
printf("%s添加成功\n", pnew->data.phoneNum);
}
void getPhone(struct node* phead) {
char input[30];
struct node* target = NULL;
printf("请输入手机编号进行查找\n");
scanf("%s", input);
if ((target = findTheNode(phead, input)) != NULL) {
infoOutput(target);
}
else {
printf("查无此信息，查询失败\n");
}
}
void updatePhone(struct node* phead) {
char input[30];
struct node* target = NULL;
printf("请输入手机变号进行修改\n");
scanf("%s", input);
if ((target = findTheNode(phead, input)) != NULL) {
printf("请输入手机编号\n");
scanf("%s", target->data.phoneNum);
printf("请输入手机品牌\n");
scanf("%s", target->data.brand);
printf("请输入手机名称\n");
scanf("%s", target->data.phoneName);
printf("请输入手机价格\n");
scanf("%s", &target->data.price);
printf("请输入手机数量\n");
scanf("%s", &target->data.num);
printf("修改成功\n");
infoOutput(target);
}
else {
printf("查无此信息，修改失败\n");
}
}
void listPhone(struct node* phead) {
struct node* pfind = phead->pnext;
while (pfind!=NULL) {
infoOutput(pfind);
pfind = pfind->pnext;
}
}
void deletePhone(struct node* phead) {
char input[20];
struct node* target = NULL;//当前删除的节点
struct node* temp = NULL;//当前删除的节点的下一个节点
struct node* pfind = phead;//当前删除的节点
printf("请输入手机编号进行删除\n");
scanf("%s", input);
if ((target = findTheNode(phead, input)) != NULL) {
temp = target->pnext;
while (pfind->pnext != target) {
pfind = pfind->pnext;
}
free(target);
target = NULL;//防止野指针的出现
pfind->pnext = temp;
printf("删除成功\n");
}
else {
printf("查无此信息，删除失败\n");
}
}
struct node* findTheNode(struct node* head, char input[]) {
struct node* target = NULL;
struct node* pfind = phead->pnext;
while (pfind != NULL) {
if (!strcmp(input, pfind->data.phoneNum)) {
target = pfind;
break;
}
pfind = pfind->pnext;
}
return target;
}
void infoOutput(struct node* pfind) {
printf("+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++");
printf("编号:%s\t品牌%s\t名称%s\t价格%.2f\t库存%d\n", pfind->data.phoneNum,
pfind->data.brand,pfind->data.phoneName,pfind->data.price,pfind->data.num);
printf("+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++");
}
Linux下的网络编程
服务端
/*server.c*/
#include
#include
#include
#include
#include
#include
#define SERVER_PORT 5678 //端口号
#define LENGTH_OF_LISTEN_QUEUE 20
#define BUFFER_SIZE 1024
#define FILE_NAME_MAX_SIZE 512
int main(int argc, char **argv)
{
// 设置一个socket地址结构server_addr,代表服务器ip地址和端口
struct sockaddr_in server_addr;
bzero(&server_addr, sizeof(server_addr));
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = htons(INADDR_ANY);
server_addr.sin_port = htons(SERVER_PORT);
// 创建用于流协议(TCP)socket，用server_socket代表服务器向客户端提供服务的接口
int server_socket = socket(PF_INET, SOCK_STREAM, 0);
if (server_socket < 0)
{
printf("Create Socket Failed!\n");
exit(1);
}
else
printf("Create Socket Success.\n");
// 把socket和socket地址结构绑定
if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)))
{
printf("Server Bind Port: %d Failed!\n", SERVER_PORT);
exit(1);
}
else
printf("Client Bind Port Success.\n");
// server_socket用于监听
if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE))
{
printf("Server Listen Failed!\n");
exit(1);
}
else
printf("Listening....\n");
// 服务器始终监听
while(1)
{
// 定义客户端的socket地址结构client_addr，当收到来自客户端的请求后，调用accept
// 接受此请求，同时将client端的地址和端口等信息写入client_addr中
struct sockaddr_in client_addr;
socklen_t length = sizeof(client_addr);
// 接受一个从client端到达server端的连接请求,将客户端的信息保存在client_addr中
// 如果没有连接请求，则一直等待直到有连接请求为止，这是accept函数的特性
// accpet返回一个新的socket,这个socket用来与此次连接到server的client进行通信
// 这里的new_server_socket代表了这个通信通道
int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);
if (new_server_socket < 0)
{
printf("Server Accept Failed!\n");
break;
}
else
printf("Server Accept Success.\n");
char buffer[BUFFER_SIZE];
bzero(buffer, sizeof(buffer));
length = recv(new_server_socket, buffer, BUFFER_SIZE, 0);
if (length < 0)
{
printf("Server Recieve Data Failed!\n");
break;
}
else
printf("Server Recieve Data Success.\n");
char file_name[FILE_NAME_MAX_SIZE + 1];
bzero(file_name, sizeof(file_name));
strncpy(file_name, buffer,
strlen(buffer) > FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE : strlen(buffer));
FILE *fp = fopen(file_name, "r"); //获取文件操作符
if (fp == NULL)
{
printf("File:\t%s Not Found!\n", file_name);
}
else
{
bzero(buffer, BUFFER_SIZE);
int file_block_length = 0;
while( (file_block_length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)
{
// 发送buffer中的字符串到new_server_socket,实际上就是发送给客户端
if (send(new_server_socket, buffer, file_block_length, 0) < 0)
{
printf("Send File:\t%s Failed!\n", file_name);
break;
}
bzero(buffer, sizeof(buffer));
}
fclose(fp);
printf("File:\t%s Transfer Finished!\n", file_name);
}
close(new_server_socket);
}
close(server_socket);
return 0;
}
客户端
/*client.c*/
#include
#include
#include
#include
#include
#include
#define SERVER_PORT 5678
#define BUFFER_SIZE 1024
#define FILE_NAME_MAX_SIZE 512
int main(int argc, char **argv)
{
if (argc != 2) //判断有没有输入服务器ip
{
printf("Usage: ./%s ServerIPAddress\n", argv[0]);
exit(1);
}
// 设置一个socket地址结构client_addr, 代表客户机的ip地址和端口
struct sockaddr_in client_addr;
bzero(&client_addr, sizeof(client_addr));
client_addr.sin_family = AF_INET; // internet协议族IPv4
client_addr.sin_addr.s_addr = htons(INADDR_ANY); // INADDR_ANY表示自动获取本机地址
client_addr.sin_port = htons(0); // auto allocated, 让系统自动分配一个空闲端口
// 创建用于internet的流协议(TCP)类型socket，用client_socket代表客户端socket
int client_socket = socket(AF_INET, SOCK_STREAM, 0);
if (client_socket < 0)
{
printf("Create Socket Failed!\n");
exit(1);
}
else
printf("Create Socket Success.\n");
// 把客户端的socket和客户端的socket地址结构绑定
if (bind(client_socket, (struct sockaddr*)&client_addr, sizeof(client_addr)))
{
printf("Client Bind Port Failed!\n");
exit(1);
}
else
printf("Client Bind Port Success.\n");
// 设置一个socket地址结构server_addr,代表服务器的internet地址和端口
struct sockaddr_in server_addr;
bzero(&server_addr, sizeof(server_addr));
server_addr.sin_family = AF_INET;
// 服务器的IP地址来自程序的参数
if (inet_aton(argv[1], &server_addr.sin_addr) == 0)
{
printf("Server IP Address Error!\n");
exit(1);
}
server_addr.sin_port = htons(SERVER_PORT);
int server_addr_length = sizeof(server_addr);
// 向服务器发起连接请求，连接成功后client_socket代表客户端和服务器端的一个socket连接
if (connect(client_socket, (struct sockaddr*)&server_addr, server_addr_length) < 0)
{
printf("Can Not Connect To %s!\n", argv[1]);
exit(1);
}
else
printf("Alreadly Connect To %s.\n", argv[1]);
char file_name[FILE_NAME_MAX_SIZE + 1];
bzero(file_name, sizeof(file_name));
printf("Please Input File Name On Server: ");
scanf("%s", file_name);
char buffer[BUFFER_SIZE];//缓存区
bzero(buffer, sizeof(buffer));
strncpy(buffer, file_name, strlen(file_name) > BUFFER_SIZE ? BUFFER_SIZE : strlen(file_name));
// 向服务器发送buffer中的数据，此时buffer中存放的是客户端需要接收的文件的名字
send(client_socket, buffer, BUFFER_SIZE, 0);
// send , sendto(), recv(),recvfrom()
FILE *fp = fopen(file_name, "w");
if (fp == NULL)
{
printf("File: %s Can Not Open To Write!\n", file_name);
exit(1);
}
// 从服务器端接收数据到buffer中
bzero(buffer, sizeof(buffer));
int length = 0;
while(length = recv(client_socket, buffer, BUFFER_SIZE, 0))
{
if (length < 0)
{
printf("Recieve Data From Server %s Failed!\n", argv[1]);
break;
}
int write_length = fwrite(buffer, sizeof(char), length, fp);
if (write_length < length)
{
printf("File:\t%s Write Failed!\n", file_name);
break;
}
bzero(buffer, BUFFER_SIZE);
}
printf("Recieve File: %s From Server[%s] Finished!\n", file_name, argv[1]);
// 传输完毕，关闭socket
fclose(fp);
close(client_socket);
return 0;
}