c++ 调用 sqlcipher

#include <iostream>
#include <string.h>
#include "sqlite3.h"

using namespace std;

static int callback(void *notUsed, int argc, char **argv, char **azColName)
{
    for (int i = ; i < argc; i++)
        cout << azColName[i] << ":" << (argv[i] ? argv[i] : "NULL") << "\t";
    cout << endl;
    return ;
}

void dbTest()
{
#pragma region 打开或创建数据库

    /*打开或创建的数据库实例句柄*/
    sqlite3 *db = NULL;

    /*数据库文件的路径及文件名*/
    const char* path = "./sqlcipher.db";
    /*根据文件路径打开数据库连接。如果数据库不存在，则创建。数据库文件的路径必须以C字符串传入*/
    int result = sqlite3_open_v2(path, &db, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_NOMUTEX | SQLITE_OPEN_SHAREDCACHE, NULL);

    if (result == SQLITE_OK)
        cout << "打开或创建数据库成功" << endl;
    else
        cout << "打开或创建数据库失败" << endl;

    sqlite3_close(db);

#pragma endregion

#pragma region 指定数据库密码

    const char* pwd = "abcdefg";
    result = sqlite3_open(path, &db);

    if (result == SQLITE_OK)
        cout << "打开数据库成功" << endl;
    else
        cout << "打开数据库失败" << endl;

    result = sqlite3_key(db, pwd, strnlen(pwd, ));
    cout << "指定数据库密码：" << result << endl;

#pragma endregion

#pragma region 执行SQL语句

    char* errmsg;
    result = sqlite3_exec(db, "CREATE TABLE [t1](id integer PRIMARY KEY AUTOINCREMENT UNIQUE, name varchar);", NULL, NULL, &errmsg);
    if (result == SQLITE_OK)
    {
        cout << "SQL 语句执行成功" << endl;
    }
    else
    {
        cout << "SQL 语句执行时发生错误：" << sqlite3_errmsg(db) << endl;
    }

    result = sqlite3_exec(db, "INSERT INTO t1(name) VALUES('张三');", NULL, NULL, &errmsg);
    if (result == SQLITE_OK)
    {
        cout << "SQL 语句执行成功" << endl;
    }
    else
    {
        cout << "SQL 语句执行时发生错误：" << sqlite3_errmsg(db) << endl;
    }

    result = sqlite3_exec(db, "SELECT * FROM t1;", callback, NULL, &errmsg);
    if (result == SQLITE_OK)
    {
        cout << "SQL 语句执行成功" << endl;
    }
    else
    {
        cout << "SQL 语句执行时发生错误：" << sqlite3_errmsg(db) << endl;
    }

#pragma endregion

    sqlite3_close(db);
}

int main(int argc, char *argv[])
{
    dbTest();

    char sz[] = "End !";
    cout << sz << endl;
    return ;
}