SQLITE简介：
This is an extension for the SQLite Embeddable SQL Database Engine. SQLite is a C library that implements an embeddable SQL database engine. Programs that link with the SQLite library can have SQL database access without running a separate RDBMS process.
SQLite is not a client library used to connect to a big database server. SQLite is the server. The SQLite library reads and writes directly to and from the database files on disk.
在 vc工程目录下 设置 Link L/对象类模块 为 sqlite3.lib
c/c++ 分类 precompiled header 选择不使用预补偿页眉
首先将SQLITE3的七个文件放在和vc工程文件同一目录下
在工程中加入 CppSQLite3DB.cpp和CppSQLite3DB.h文件
# include "CppSQLite3.h"
extern CppSQLite3DB db;/////数据库对象
remove("c:\\test.db");
db.open("c:\\test.db");///打开数据库文件
建立表格：
db.execDML("create table Customer(CustomerName char(50), RoomNumber int, CustomerId int, ComeTime int,Money int);");
db.execDML("create table Room(RoomNumber int, RoomPrice int, RoomState char[20]);");
db.execDML("create table Manager(ManagerName char[20],PassWord int);");
插入数据：
string szCmd;
string szName = m_data1;
szCmd = "insert into Customer values(" ;
szCmd +="'";
szCmd +=szName;
szCmd +="'";
szCmd +=",";
sprintf(a,"%d",m_data2);
szCmd += a;
szCmd += ",";
sprintf(b,"%d",m_data3);
szCmd +=b;
szCmd +=","；
sprintf(c,"%d",m_data4);
szCmd += c;
szCmd += ",";
sprintf(d,"%d",m_data5);
szCmd += d;
szCmd += ");";
db.execDML(szCmd.c_str());/////////////插入SQL语句
MessageBox("提交成功，请继续!");
更新数据：
char k[20];//提交后更新房间信息
string szCkd;
szCkd="update Room set RoomState = 'notnull' where RoomNumber=";
sprintf(k,"%d",m_data2);
szCkd +=k;
szCkd +=";";
db.execDML(szCkd.c_str()); //////////插入SQL语句
查询数据：
CppSQLite3Query q = db.execQuery("select * from Customer;");
while(!q.eof()){
UpdateData(true);
if(m_data1==q.getIntField(1))
{
s.m_data1=q.getStringField(0);
s.m_data2=q.getIntField(1);
s.m_data3=q.getIntField(2);
s.m_data4=q.getFloatField(3);
s.m_data5=q.getIntField(4);
s.DoModal();
UpdateData(false);
break;}
q.nextRow();
if(q.eof()==true)
MessageBox("本旅馆无该房间!");
}
删除数据：
char a[20];
sprintf(a,"%d",m_data2);
string szCmd;
szCmd="delete from Room where RoomNumber =" ;
szCmd+=a;
szCmd+=";";
int b=0;
b=db.execDML(szCmd.c_str());
if(b==0)
MessageBox("操作错误，没有该房间信息");
else
MessageBox("删除房间信息成功");
以上为SQLITE3在窗体交互下简易实现几种数据库基本功能的简单说明！
