电子词典项目（有借鉴）

服务器

#include
#include
 
#define err(msg) do{printf("__%d__",__LINE__);perror(msg);return -1;}while(0)
#define PORT 8888
#define IP "192.168.125.51"
typedef void (*sighandler_t)(int);
typedef struct
{
	char flag;
	char name[20];
	char text[128];
}msg;
char mean[32]="";
int do_register(msg *usr,int afd,sqlite3* db)
{ 
	char sql[256] = "" ;
	sprintf(sql,"insert into usr values('%s','%s');",usr->name,usr->text);
	char* errmsg = NULL;
	if(sqlite3_exec(db,sql,NULL,NULL,&errmsg) != SQLITE_OK)
		fprintf(stderr, "__%d__ sqlite3_exec:%s\n", __LINE__, errmsg);
		strcpy(usr->text,"usr name already exist");
		printf("usr name already exist\n");
	}
	else
	{
		printf("registeration is ok\n");
		strcpy(usr->text,"usr name registeration successed");	
	}
	if(send(afd,usr,sizeof(msg),0)<0)err("send");
	
	if(recv(afd,usr,sizeof(msg),0)<0)err("recv");
	return 0;
}
int do_login(msg *usr,int afd,sqlite3* db)
{
	sqlite3* db_delete= NULL;
	char sql[256] ="";
	char* errmsg = NULL;
	char **pres=NULL;
	int row,column;
	sprintf(sql,"select * from usr where name='%s' and password='%s';",usr->name,usr->text);
	if(sqlite3_get_table(db, sql,&pres,&row,&column, &errmsg) != SQLITE_OK)
	{
		fprintf(stderr, "__%d__ sqlite3_get_table:%s\n", __LINE__, errmsg);
		return -1;
	}
	if(row==1) 
	{
		printf("login is ok\n");
		bzero(usr->text,sizeof(usr->text));
		strcpy(usr->text,"ok");
	}
	else{
		printf("login is failed\n");
		strcpy(usr->text,"usr name or password inputs error!");	
	}
	if(send(afd,usr,sizeof(msg),0)<0)err("send");
 
	if(recv(afd,usr,sizeof(msg),0)<0)err("recv");	
	return 0;
}
int callback_s(void* arg ,int columns, char** column_text, char** column_name)
{
	for(int i=1; itext);	
	t =time(NULL);
    info =localtime(&t);
 
	sprintf(TIME,"%d-%02d-%02d %02d:%02d:%02d",info->tm_year+1900, info->tm_mon+1, info->tm_mday,info->tm_hour, info->tm_min, info->tm_sec);
	sprintf(sql,"select * from dict where word='%s';",usr->text);
	char* errmsg = NULL;
	if(sqlite3_exec(db, sql,callback_s,&flag, &errmsg) != SQLITE_OK)
	{
		fprintf(stderr, "__%d__ sqlite3_exec:%s\n", __LINE__, errmsg);
		return -1;
	}
	bzero(usr->text,sizeof(usr->text));	
	strcpy(usr->text,mean);
	sprintf(sql_h,"insert into history values('%s','%s','%s',\'%s\');",usr->name,word,mean,TIME);
	
	bzero(mean,sizeof(mean));
	bzero(word,sizeof(word));
	if(sqlite3_exec(db,sql_h,NULL,NULL,&errmsg) != SQLITE_OK)	
	{
		fprintf(stderr, "__%d__ sqlite3_exec:%s\n", __LINE__, errmsg);		
	}
	if(send(afd,usr,sizeof(msg),0)<0)err("send");
 
	if(recv(afd,usr,sizeof(msg),0)<0)err("recv");	
	
	return 0;
}
int callback_h(void* arg ,int columns, char** column_text, char** column_name)
{
	int afd=*(int *)arg;
	msg usr;
	char word[64]="",TIME[32]="";
	bzero(usr.text,sizeof(usr.text));
	bzero(usr.name,sizeof(usr.name));	
	for(int i=0; iname);
	char* errmsg = NULL;
	if(sqlite3_exec(db, sql,callback_h,&afd, &errmsg) != SQLITE_OK)
	{
		fprintf(stderr, "__%d__ sqlite3_get_table:%s\n", __LINE__, errmsg);
		return -1;
	}	
	printf("this is all\n");
	usr->text[0]='\0';
 
	if(send(afd,usr,sizeof(msg),0)<0)err("send");
	exit(0);
}
void handler(int sig)
{
	while(waitpid(-1,NULL,WNOHANG)>0);
}
int main(int argc, const char *argv[])
{
	int afd,sfd=socket(AF_INET,SOCK_STREAM,0);
	if(sfd<0)err("socket");
	int reuse = 1;
	if(setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) < 0)err("setsockopt");
	struct sockaddr_in sin;
	sin.sin_family=AF_INET;
	sin.sin_port=htons(PORT);
	sin.sin_addr.s_addr=inet_addr(IP);
	if(bind(sfd,(struct sockaddr*)&sin,sizeof(sin))<0)err("bind");
	if(listen(sfd,10)<0)err("listen");
	struct sockaddr_in cin;
	socklen_t addrlen=sizeof(cin);
	if(SIG_ERR==signal(SIGCHLD,handler))err("signal");
	
		sqlite3* db = NULL;
	if(sqlite3_open("./my.db", &db) != SQLITE_OK)
	{
		printf("err_code:%d\n", sqlite3_errcode(db));
		printf("errmsg:%s\n", sqlite3_errmsg(db));
		fprintf(stderr, "__%d__ sqlite3_open failed\n", __LINE__);
		return -1;
	}
 
	char* sql_dict = "create table if not exists dict (word char,mean char);" ;
	char* sql_usr = "create table if not exists usr (name char primary key,password char);" ;
	char* sql_history = "create table if not exists history (name char,word char,mean char,time char);" ;
	char* errmsg = NULL;
	if(sqlite3_exec(db, sql_usr, NULL, NULL, &errmsg) != SQLITE_OK)
	{
		fprintf(stderr, "__%d__ sqlite3_exec:%s\n", __LINE__, errmsg);
		return -1;
	}
	if(sqlite3_exec(db, sql_history, NULL, NULL, &errmsg) != SQLITE_OK)
	{
		fprintf(stderr, "__%d__ sqlite3_exec:%s\n", __LINE__, errmsg);
		return -1;
	}
	if(sqlite3_exec(db, sql_dict, NULL, NULL, &errmsg) != SQLITE_OK)
	{
		fprintf(stderr, "__%d__ sqlite3_exec:%s\n", __LINE__, errmsg);
		return -1;
	}
	msg usr;
	char choose = 0;
	int res=0,pid;
	while(1)
	{
		if((afd=accept(sfd,(struct sockaddr*)&sin,&addrlen))<0)err("accept");
 
		pid=fork();
		if(pid>0)
		{
					close(afd);
		}
		else if(pid==0)
		{
			memset(&usr,0,sizeof(msg));
					res=recv(afd,&usr,sizeof(usr),0);
			if(res<0)err("recv");
			printf("flag=%c\n",usr.flag);
			while(res>0)
			{
				switch(usr.flag)
				{
					case 'R':do_register(&usr,afd,db);break;
					case 'L':do_login(&usr,afd,db);break;
					case 'S':do_search(&usr,afd,db);break;
					case 'H':do_history(&usr,afd,db);break;
					default:printf("error\t261\n");
				}
			}
		}
	}
	return 0;
}

客户端

#include 
#include
 
#define err(msg) do{printf("__%d__",__LINE__);perror(msg);return -1;}while(0)
#define PORT 8888
#define IP "192.168.125.51"
typedef struct 
{
	char flag;
	char name[20];
	char text[128];//密码或单词
}msg;
int do_register(msg *usr,int sfd)
{ 
	printf("注册中\n");
	ssize_t res;
	usr->flag='R';
	printf("用户名：");
	scanf("%s",usr->name);
	printf("密码:");
	scanf("%s",usr->text);
	if(send(sfd,usr,sizeof(msg),0)<0)err("send");
	res = recv(sfd,usr, sizeof(msg), 0);
	if(res < 0)err("recv");
	else if(0 == res)
	{
		printf("server is off-line\n");
	}
	printf("%s\n",usr->text);
	return 0;
}
int do_login(msg *usr,int sfd)
{	
	printf("登录...\n");
	ssize_t res;
	usr->flag='L';   
	printf("用户名：");
	scanf("%s",usr->name);
	printf("密码:");
	scanf("%s",usr->text);
	if(send(sfd,usr,sizeof(msg),0)<0)err("send");		
	
	res = recv(sfd,usr,sizeof(msg),0);
	if(res < 0)err("recv");
	
	if(strncmp(usr->text,"ok",3)==0)
	{
		printf("%s : log_in successfully\n",usr->name);
		return 1;
	} 
	else{
	printf("%s\n",usr->text);
	}
	return 0;
}
 
 
int do_search(msg *usr,int sfd)
{
	printf("#退出\n");
	ssize_t res;
	usr->flag='S';
	while(1)
	{
	printf("查询的单词：");
	scanf("%s",usr->text);
	if(strcmp(usr->text,"#")==0)break;
	if(send(sfd,usr,sizeof(msg),0)<0)err("send");
		
	res=recv(sfd,usr, sizeof(msg), 0);
	if(res<0)err("recv");
	printf("mean:%s\n",usr->text);
	}
}
int do_history(msg *usr,int sfd)
{
	usr->flag='H';
	ssize_t res;
	if(send(sfd,usr,sizeof(msg),0)<0)err("send");
	printf("the following is history:\n");
	while(1)
	{
	res = recv(sfd,usr, sizeof(msg), 0);
	if(res<0)err("recv");
	else if(res>0)
	{
	printf("%s\n",usr->text);
	}
	else 
	{
		printf("this is all history\n");
		break;
	}
	}
	return 0;	
}
int main(int argc, const char *argv[])
{	int sfd=socket(AF_INET,SOCK_STREAM,0);	
	if(sfd<0)err("msg");
	int reuse = 1;
	if(setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) < 0)err("setsockopt");
	struct sockaddr_in sin;
	sin.sin_family=AF_INET;
	sin.sin_port=htons(PORT);
	sin.sin_addr.s_addr=inet_addr(IP);
	if(connect(sfd,(struct sockaddr*)&sin,sizeof(sin))<0)err("connect");
	msg usr;
	char choose = 0;
	int choice=0;//不初始化
	while(1)
	{
		memset(&usr,0,sizeof(msg));
		system("clear");
		puts("1. 注册");
		puts("2. 登录");
		puts("3. 退出");
	 
		printf("请输入选项>>>");
		scanf("%c",&choose);	
	
		switch(choose)
		{
		case '1':
			do_register(&usr,sfd);
			break;
		case '2':
			if(do_login(&usr,sfd)>0)
			{
			goto log_in;
			}
			break;
		case '3':
			close(sfd);
			exit(0);
			break;
		default:
			printf("错误，重新输入\n");
		}
 
		printf("清屏>>>\n");
		while(getchar()!=10);
 
	}
	
log_in:
	while(1)
	{
	printf("1.查询单词");
	printf("2. 历史记录");
	printf("3. 退出");
 
	printf("输入选项>>>");

	scanf("%d",&choice);
	getchar();
	switch(choice)
	{
	case 1:
	
		do_search(&usr,sfd);
		break;
	case 2:	
		do_history(&usr,sfd);
			break;	
	case 3:	
			close(sfd);
			exit(0);
			break;	
	default:
		printf("输入错误，请重新输入\n");
	}
	}
	
	return 0;
}

导入

#include 
#include 
#include 
 
int main(int argc, const char *argv[])
{
	//打开数据库
	sqlite3* db = NULL;
	if(sqlite3_open("./my.db", &db) != SQLITE_OK)
	{
		fprintf(stderr, "__%d__ sqlite3_open:%s\n", __LINE__, sqlite3_errmsg(db));
		return -1;
	}
 
	char sql[400] = "create table if not exists dict (word char, mean char)";
	char* errmsg = NULL;
	if(sqlite3_exec(db, sql, NULL, NULL, &errmsg) != SQLITE_OK)
	{
		fprintf(stderr, "__%d__ sqlite3_exec:%s\n", __LINE__,errmsg);
		return -1;
	}
 
 
	
	FILE* fp = fopen("./dict.txt", "r");
	if(NULL == fp)
	{
		perror("fopen");
		return -1;
	}
 
	char buf[300] = "";
	char word[50]="", mean[300]="";
	int i = 0;
 
	while(fgets(buf, sizeof(buf), fp) != NULL)
	{
		buf[strlen(buf)-1] = 0;
	
		for(i=0; i