Разработать простинькую программу на C++ (QT)

What needs to be done: develop an EXE application in C++; create a modern graphical interface according to my design; implement the program logic; ensure stable operation on Windows 10 and Windows 11; provide the source code in Visual Studio (.sln, .vcxproj). I already have: interface design (screenshots attached); program operation concept; list of features to discuss with the performer. Requirements for the performer: confident knowledge of C++; experience with Microsoft Visual Studio; experience in developing Windows Desktop applications; neat and readable code; willingness to maintain communication during development. Please, in your response send: examples of your EXE programs; experience with C++; estimated completion time; cost of work.

Good day It is necessary to create a module that will work with the Firebird database in C++ for selling products. There are examples of ready-made solutions and a description of the module's functionality. Main functions: authorization, selection of products on the screen from groups/subgroups, transition to the cart, payment by card, and printing the receipt. The program must work on Windows 10 and above, using the existing database.

A patch is required for the graphics card driver that expands the capabilities of managing the graphics adapter by adding additional user settings. The patch must integrate into the existing driver architecture without disrupting its core functionality and ensure compatibility with supported versions of the operating system. The main goal is to provide more flexible access to parameters that are not available in the standard driver control panel, with the ability to modify them through a user interface or software API. The patch should provide a modular structure that allows for the addition of new parameters in the future without significant code redesign. It is necessary to ensure proper error handling, change logging, the ability to revert settings to default values, as well as maintain compatibility with future driver updates as much as possible. The solution should be accompanied by technical documentation describing the architecture, implemented capabilities, limitations, and testing recommendations.