C++连接sqlite数据库的增删查改操作

这个代码是接着上次说的，要用VS2013操作数据库，首先要配置好环境，创建好数据库表等。

不明白的翻我前面2篇看看~~~

关于前面的用到的goto 语句，这个我也是参考其他博主写的，现在我注释掉了，毕竟goto咱也不懂，哈哈哈~~~

下面给上我的代码，不出意外直接复制粘贴可以使用：

#define _CRT_SECURE_NO_WARNINGS
#include "stdafx.h"  
#include "sqlite3.h"  
#include <iostream>  
#include <string> 
#include <Windows.h>
using namespace std;

sqlite3 * pDB = NULL;

//查找  
bool SelectUser();

//增加  
bool AddUser(const string& sName, const string& sFenshu);

//删除
bool DeleteUser(const string& sName);

//修改
bool ModifyUser(const string& sName, const string& sFenshu);

int _tmain(int argc, _TCHAR* argv[])
{
    //打开路径采用utf-8编码  
    //如果路径中包含中文，需要进行编码转换  
    int nRes = sqlite3_open("D:\\sqlite\\fuck.db;", &pDB);
    if (nRes != SQLITE_OK)
    {
        cout << "Open database fail: " << sqlite3_errmsg(pDB);
        //goto QUIT;
        sqlite3_close(pDB);
    }
    else
    {
        system("color A");
        cout << "打开数据库成功！" << endl;
        cout << "**************************C++连接sqlite数据操作**************************" << endl;
        cout << "1.查询" << endl;
        cout << "2.添加" << endl;
        cout << "3.删除" << endl;
        cout << "4.修改" << endl;
        cout << "0.退出" << endl;
        cout << "**************************C++连接sqlite数据操作**************************" << endl;
        cout << "请选择你需要的操作" << endl;
    }
    
    int a;
    char name[20];
    char fenshu[20];
    while (true)
    {
        cin >> a;
        switch (a){
        case 1:
            cout << "你选择了查询" << endl;
            SelectUser();
            cout << "**************************请继续选择操作或/退出**************************" << endl;
            break;
        case 2:
            cout << "你选择了添加" << endl;
            cout << "*******************请输入你要添加的信息如：xiaoming,18*******************" << endl;
            
            //cin >> id;
            cout << "name:" << endl;
            scanf("%s",&name);
            cout << "fenshu:" << endl;
            scanf("%s",&fenshu);
            //cout <<name  << fenshu << endl;
            if (AddUser(name,fenshu)){
            
                cout << "添加成功！" << endl;
                cout << "**************************请继续选择操作或/退出**************************" << endl;
            }
            break;
        case 3:
            cout << "你选择了删除" << endl;
            cout << "********************请输入你要删除的信息如：xiaoming*********************" << endl;
            //删除  
            cout << "name:" << endl;
            scanf("%s", &name);
            if (DeleteUser(name))
            {
                cout << "信息删除成功！" << endl;
                cout << "**************************请继续选择操作或/退出**************************" << endl;
            }

            break;
        case 4:
            cout << "你选择了修改" << endl;
            cout << "*******************请输入你要修改的信息如：xiaoming,18*******************" << endl;
            //cin >> id;
            cout << "name:" << endl;
            scanf("%s", &name);
            cout << "fenshu:" << endl;
            scanf("%s", &fenshu);
            if (ModifyUser(name,fenshu))
            {
                cout << "信息修改成功！" << endl;
                cout << "**************************请继续选择操作或/退出**************************" << endl;
            }
            break;
        default:
            cout << "你选择了退出" << endl;
            cout << "goodbye" << endl;
            exit(0);

        
        
        }

    }

    //查找 
    /*if (!SelectUser())
    {
        
        goto QUIT;
    }*/

QUIT:
    sqlite3_close(pDB);

    return 0;
}


static int UserResult(void *NotUsed, int argc, char **argv, char **azColName)
{

    for (int i = 0; i < argc; i++)
    {
        
        cout << azColName[i] << " = " << (argv[i] ? argv[i] : "NULL") << ", ";
    }
    //sqlite3_free_table(azColName);
    cout << endl;
    return 0;
}

bool SelectUser()
{
    char* cErrMsg;
    
//    int res = sqlite3_exec(pDB, "select student.id, student.name,score.fenshu from student, score WHERE student.id= score.id;", UserResult, 0, &cErrMsg);
    int res = sqlite3_exec(pDB, "select * from score", UserResult, 0, &cErrMsg);

    if (res != SQLITE_OK)
    {
        cout << "select fail: " << cErrMsg << endl;
        return false;
    }

    return true;
}

//添加数据
bool AddUser( const string& sName, const string& sFenshu)
{
    string strSql = "";
    strSql += "insert into score(name,fenshu)";
    strSql += "values('";
    strSql += sName;
    strSql += "',";
    strSql += sFenshu;
    strSql += ");";

    char* cErrMsg;
    int nRes = sqlite3_exec(pDB, strSql.c_str(), 0, 0, &cErrMsg);
    if (nRes != SQLITE_OK)
    {
        cout << "add score fail: " << cErrMsg << endl;
        return false;
    }
    else
    {
        cout << "add score success: " << sName.c_str() << "\t" << sFenshu.c_str() << endl;
    }

    return true;
}

//删除数据
bool DeleteUser(const string& sName)
{
    string strSql = "";
    strSql += "delete from score where name='";
    strSql += sName;
    strSql += "';";

    char* cErrMsg;
    int nRes = sqlite3_exec(pDB, strSql.c_str(), 0, 0, &cErrMsg);
    if (nRes != SQLITE_OK)
    {
        cout << "delete score fail: " << cErrMsg << endl;
        return false;
    }
    else
    {
        cout << "delete score success: " << sName.c_str() << endl;
    }

    return true;
}

//修改数据
bool ModifyUser(const string& sName, const string& sFenshu)
{
    string strSql = "";
    strSql += "update score set fenshu =";
    strSql += sFenshu;
    strSql += " where name='";
    strSql += sName;
    strSql += "';";

    char* cErrMsg;
    int nRes = sqlite3_exec(pDB, strSql.c_str(), 0, 0, &cErrMsg);
    if (nRes != SQLITE_OK)
    {
        cout << "modify score fail: " << cErrMsg << endl;
        return false;
    }
    else
    {
        cout << "modify score success: " << sName.c_str() << "\t" << sFenshu.c_str() << endl;
    }

    return true;
}

说明：score 是我自己 在fuck.db创建的表，你们可以自己创建，创建教程前面也有~~

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