C++Qt5.14.2版本不用UI形式完整代码绘制出频率响应曲线图和幅度响应曲线图

好的，下面是一个C++和Qt5.14.2版本的示例代码，它使用Qt Charts模块绘制频率响应曲线图和幅度响应曲线图：

#include <QApplication>
#include <QtCharts>

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

    // Create a chart
    QChart *chart = new QChart();

    // Set the title
    chart->setTitle("Frequency and Amplitude Response");

    // Create X-axis
    QValueAxis *axisX = new QValueAxis;
    axisX->setTitleText("Frequency (Hz)");

    // Create Y-axis for frequency response
    QValueAxis *axisY1 = new QValueAxis;
    axisY1->setTitleText("Frequency Response");

    // Create Y-axis for amplitude response
    QValueAxis *axisY2 = new QValueAxis;
    axisY2->setTitleText("Amplitude Response");

    // Add the axes to the chart
    chart->addAxis(axisX, Qt::AlignBottom);
    chart->addAxis(axisY1, Qt::AlignLeft);
    chart->addAxis(axisY2, Qt::AlignRight);

    // Create a series for the frequency response curve
    QLineSeries *freqSeries = new QLineSeries();

    // Add data to the series
    freqSeries->append(0, 0);
    freqSeries->append(1000, 0.5);
    freqSeries->append(2000, 1);
    freqSeries->append(3000, 0.8);
    freqSeries->append(4000, 0.6);
    freqSeries->append(5000, 0.4);

    // Create a series for the amplitude response curve
    QLineSeries *ampSeries = new QLineSeries();

    // Add data to the series
    ampSeries->append(0, 1);
    ampSeries->append(1000, 0.8);
    ampSeries->append(2000, 0.5);
    ampSeries->append(3000, 0.3);
    ampSeries->append(4000, 0.2);
    ampSeries->append(5000, 0.1);

    // Add the series to the chart
    chart->addSeries(freqSeries);
    chart->addSeries(ampSeries);

    // Attach the series to the axes
    chart->setAxisX(axisX, freqSeries);
    chart->setAxisY(axisY1, freqSeries);
    chart->setAxisY(axisY2, ampSeries);

    // Create a view and set the chart as its model
    QChartView *chartView = new QChartView(chart);
    chartView->setRenderHint(QPainter::Antialiasing);

    // Show the chart view
    chartView->show();

    return a.exec();
}

这段代码创建了一个简单的频率响应曲线图和幅度响应曲线图，您可以根据自己的需要修改数据来绘制不同的曲线。要绘制幅度响应曲线图，您需要创建一个新的QLineSeries并将其添加到图表中，然后将其附加到一个新的Y轴上。最后，使用setAxisY()函数将相应的系列与它们的Y轴连接起来。