qt qlcdnumber change value

To change the value of a QLCDNumber widget in a Qt application using C++, you can follow these steps:

1. Access the QLCDNumber widget: First, you need to have a reference to the QLCDNumber widget object in your code. You can either create a new instance of the widget or retrieve an existing one if you have it in your application's UI.

2. Set the value: Once you have access to the QLCDNumber widget, you can set its value using the QLCDNumber::display() method. This method takes a numerical value as a parameter and updates the displayed value on the widget accordingly.

cpp QLCDNumber *lcdNumber = new QLCDNumber(this); // Create a new QLCDNumber widget lcdNumber->display(42); // Set the value to 42

In this example, we create a new QLCDNumber widget and set its value to 42.

1. Update the value: If you want to change the value of the QLCDNumber widget dynamically, you can call the display() method again with a new value.

cpp lcdNumber->display(99); // Change the value to 99

In this example, we update the value of the QLCDNumber widget to 99.

By following these steps, you can change the value displayed by a QLCDNumber widget in a Qt application using C++.