qt输入生日输出年龄代码

以下是一个基本的Qt代码示例，用于输入生日并计算年龄：

#include <QtWidgets/QApplication>
#include <QtWidgets/QWidget>
#include <QtWidgets/QLabel>
#include <QtWidgets/QLineEdit>
#include <QtWidgets/QPushButton>
#include <QtWidgets/QHBoxLayout>
#include <QDate>

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

    QWidget *window = new QWidget;
    window->setWindowTitle("Age Calculator");

    QLabel *birthLabel = new QLabel("Enter your birth date:");
    QLineEdit *birthLineEdit = new QLineEdit;
    QPushButton *calculateButton = new QPushButton("Calculate");
    QLabel *ageLabel = new QLabel("Your age is:");

    QHBoxLayout *layout = new QHBoxLayout;
    layout->addWidget(birthLabel);
    layout->addWidget(birthLineEdit);
    layout->addWidget(calculateButton);
    layout->addWidget(ageLabel);

    window->setLayout(layout);

    QObject::connect(calculateButton, &QPushButton::clicked, [=]() {
        QDate birthDate = QDate::fromString(birthLineEdit->text(), "yyyy-MM-dd");
        QDate currentDate = QDate::currentDate();
        int age = birthDate.daysTo(currentDate) / 365;
        ageLabel->setText(QString("Your age is: %1").arg(age));
    });

    window->show();

    return app.exec();
}

该代码使用Qt的基本部件（QApplication，QWidget，QLabel，QLineEdit，QPushButton和QHBoxLayout）创建了一个简单的窗口，其中用户可以输入他们的生日，并在点击“Calculate”按钮后计算他们的年龄。该代码使用QDate类来计算年龄，然后将结果显示在标签中。