qt设计一个计算器的代码并语音播报

以下是一个简单的计算器的Qt代码，同时支持语音播报结果：

#include <QApplication>
#include <QWidget>
#include <QGridLayout>
#include <QPushButton>
#include <QLineEdit>
#include <QTextToSpeech>

class Calculator : public QWidget
{
public:
    Calculator(QWidget *parent = nullptr) : QWidget(parent)
    {
        // 设置窗口标题和大小
        setWindowTitle(tr("Calculator"));
        setFixedSize(200, 200);

        // 创建文本框和语音播报对象
        resultLineEdit = new QLineEdit(this);
        resultLineEdit->setReadOnly(true);
        tts = new QTextToSpeech(this);

        // 创建数字和操作符按钮
        QGridLayout *gridLayout = new QGridLayout(this);
        QPushButton *numButtons[10];
        for (int i = 0; i < 10; ++i) {
            numButtons[i] = new QPushButton(QString::number(i), this);
            gridLayout->addWidget(numButtons[i], i / 3, i % 3);
            connect(numButtons[i], &QPushButton::clicked, this, [=](){
                resultLineEdit->setText(resultLineEdit->text() + QString::number(i));
            });
        }
        QPushButton *plusButton = new QPushButton("+", this);
        gridLayout->addWidget(plusButton, 0, 3);
        connect(plusButton, &QPushButton::clicked, this, [=](){
            calculate('+');
        });
        QPushButton *minusButton = new QPushButton("-", this);
        gridLayout->addWidget(minusButton, 1, 3);
        connect(minusButton, &QPushButton::clicked, this, [=](){
            calculate('-');
        });
        QPushButton *multiplyButton = new QPushButton("*", this);
        gridLayout->addWidget(multiplyButton, 2, 3);
        connect(multiplyButton, &QPushButton::clicked, this, [=](){
            calculate('*');
        });
        QPushButton *divideButton = new QPushButton("/", this);
        gridLayout->addWidget(divideButton, 3, 3);
        connect(divideButton, &QPushButton::clicked, this, [=](){
            calculate('/');
        });

        // 创建计算和清除按钮
        QPushButton *calculateButton = new QPushButton(tr("Calculate"), this);
        gridLayout->addWidget(calculateButton, 4, 2, 1, 2);
        connect(calculateButton, &QPushButton::clicked, this, [=](){
            calculate('=');
        });
        QPushButton *clearButton = new QPushButton(tr("Clear"), this);
        gridLayout->addWidget(clearButton, 4, 0, 1, 2);
        connect(clearButton, &QPushButton::clicked, this, [=](){
            resultLineEdit->clear();
        });
    }

private:
    QLineEdit *resultLineEdit;
    QTextToSpeech *tts;

    void calculate(char op)
    {
        QString text = resultLineEdit->text();
        if (text.isEmpty()) {
            return;
        }

        double result = 0;
        QStringList operands = text.split(op);
        if (op == '+') {
            result = operands[0].toDouble() + operands[1].toDouble();
        } else if (op == '-') {
            result = operands[0].toDouble() - operands[1].toDouble();
        } else if (op == '*') {
            result = operands[0].toDouble() * operands[1].toDouble();
        } else if (op == '/') {
            result = operands[0].toDouble() / operands[1].toDouble();
        }

        resultLineEdit->setText(QString::number(result));
        tts->say(QString::number(result));
    }
};

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Calculator calculator;
    calculator.show();
    return a.exec();
}

需要注意的是，使用语音播报功能需要在系统中安装并启用TTS引擎，例如在Windows系统中可以使用Microsoft Speech API，具体安装方法可以参考Qt文档中的相关说明。