请用qt写出get请求带请求头的代码

以下是使用 Qt 发送带请求头的 GET 请求的示例代码：

#include <QCoreApplication>
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QNetworkRequest>
#include <QDebug>

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

    QNetworkAccessManager manager;
    QNetworkRequest request(QUrl("https://www.example.com"));
    request.setRawHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36");
    request.setRawHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8");

    QNetworkReply *reply = manager.get(request);
    QObject::connect(reply, &QNetworkReply::finished, [&](){
        if(reply->error() == QNetworkReply::NoError){
            qDebug() << "Success: " << reply->readAll();
        }else{
            qDebug() << "Error: " << reply->errorString();
        }
        reply->deleteLater();
        a.quit();
    });

    return a.exec();
}

这段代码使用 QNetworkAccessManager 类发送了一个 GET 请求，并设置了请求头 User-Agent 和 Accept。如果请求成功，将会输出响应内容；如果请求失败，将会输出错误信息。