在c++中使用mysql库的示例代码解析

在C++中使用MySQL库可以通过MySQL Connector/C++库来实现。下面是一个简单的示例代码，演示如何连接到MySQL数据库，执行查询并获取结果：

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

using namespace std;

int main() {
    sql::Driver *driver;
    sql::Connection *con;
    sql::Statement *stmt;
    sql::ResultSet *res;

    try {
        driver = get_driver_instance();
        con = driver->connect("tcp://127.0.0.1:3306", "username", "password");
        con->setSchema("database_name");

        stmt = con->createStatement();
        res = stmt->executeQuery("SELECT * FROM table_name");

        while (res->next()) {
            cout << "Column1: " << res->getString(1) << endl;
            cout << "Column2: " << res->getString(2) << endl;
            // Add more columns as needed
        }

        delete res;
        delete stmt;
        delete con;
    } catch (sql::SQLException &e) {
        cout << "# ERR: SQLException in " << __FILE__;
        cout << "(" << __FUNCTION__ << ") on line " << __LINE__ << endl;
        cout << "# ERR: " << e.what();
        cout << " (MySQL error code: " << e.getErrorCode();
        cout << ", SQLState: " << e.getSQLState() << " )" << endl;
    }

    return 0;
}