Qt5学习之路01：直接使用QWidget类创建一个空的窗口_c++qt5如何创建一个无标题的窗口

main.cpp

#include <QApplication>
#include <QWidget>

int main(int argc, char** argv)
{
    QApplication app(argc, argv);
    QWidget w;
    w.resize(640, 320);
    w.move(400, 200);
    w.show();

    return app.exec();
}
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CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

project(01_empty_window)
set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)
find_package(Qt5 COMPONENTS Widgets REQUIRED)
add_executable(${PROJECT_NAME} "main.cpp")
target_link_libraries(${PROJECT_NAME} Qt5::Widgets)
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编译运行结果如下：