(原)Qt之HelloWorld
孔令春
posted @ 2009年9月21日 05:43
in 开发语言
with tags
Qt之HelloWorld
, 4971 阅读
怪了，好像学任何语言都是从Hello world的，呵呵，Qt也不例外。
代码如下：
/* Hello/hello.cpp */
#include <QApplication>
#include <QMainWindow>
#include <QCore/QTextCodec>
#include <QLabel>
int main(int argc, char *argv[])
{
QApplication app(argc,argv);
QTextCodec::setCodecForTr(QTextCodec::codecForName("utf-8"));
QMainWindow *window = new QMainWindow;
window->setWindowTitle("Hello Qt");
QLabel *label = new QLabel("<h2><font color =
red><i>Hello</i></font>"
"<b>World!</b></h2>");
label->setAlignment(Qt::AlignCenter); //居中对齐
window->setCentralWidget(label); //将Label设置为中间部件
window->adjustSize(); //调整窗口到合适大小
window->show();
return app.exec();
}
必須的东西：
#include <QApplication>
int main(int argc,char *argv[])
{
QApplication app(argc,argv);
...
return app.exec();
}
编译：
qmake -project －－－生成Qt的项目文件
qmake －－－生成MakeFile文件
make －－－执行MakeFile文件（调用g＋＋编译）
注意：
生成的项目文件名，默认是与上一级文件夹同名的，所以建议你最好为你的程序单独建一个文件夹。
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