之前用C#的WPF写了一个平均绩点计算器，发到学校的贴吧里，反响还不错。不过没过几个月，就有人写了一个网络版的计算器，把我盖过去了。“既生瑜，何生亮？”开个玩笑。
转到Qt之后，学了一阵子，想练练手，就用Qt写了一个平均绩点计算器。
源码如下
mainwindow,h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include<QLineEdit>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private:
Ui::MainWindow *ui;
double result;
QList<QLineEdit*> LX,LJ;
int count;
public slots:
void slot_add() ;
void slot_cal();
};
#endif // MAINWINDOW_H
mainwindow,cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include<QList>
#include<QString>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
count=2;
LX.append(ui->LEX1);
LX.append(ui->LEX2);
LJ.append(ui->LEJ1);
LJ.append(ui->LEJ2);
connect(ui->cal,SIGNAL(clicked()),this,SLOT(slot_cal()));
connect(ui->add,SIGNAL(clicked()),this,SLOT(slot_add()));
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::slot_add()
{
count++;
LX.append(new QLineEdit(this));
LJ.append(new QLineEdit(this));
ui->VLX->addWidget(LX[count-1]);
ui->VLJ->addWidget(LJ[count-1]);
}
void MainWindow::slot_cal()
{
double sum=0,sum2=0;
for(int i=0;i<=count-1;i++)
sum=sum+LX[i]->text().toInt();//zong xue fen
for(int i=0;i<=count-1;i++)
sum2=sum2+(LX[i]->text().toDouble())*(LJ[i]->text().toDouble());
ui->pjjd->setText(QString::number(sum2/sum));
}
mainwindow,ui
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>MainWindow</class>
<widget class="QMainWindow" name="MainWindow">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>520</width>
<height>405</height>
</rect>
</property>
<property name="palette">
<palette>
<active>
<colorrole role="Base">
<brush brushstyle="SolidPattern">
<color alpha="255">
<red>255</red>
<green>255</green>
<blue>255</blue>
</color>
</brush>
</colorrole>
<colorrole role="Window">
<brush brushstyle="SolidPattern">
<color alpha="255">
<red>132</red>
<green>239</green>
<blue>240</blue>
</color>
</brush>
</colorrole>
</active>
<inactive>
<colorrole role="Base">
<brush brushstyle="SolidPattern">
<color alpha="255">
<red>255</red>
<green>255</green>
<blue>255</blue>
</color>
</brush>
</colorrole>
<colorrole role="Window">
<brush brushstyle="SolidPattern">
<color alpha="255">
<red>132</red>
<green>239</green>
<blue>240</blue>
</color>
</brush>
</colorrole>
</inactive>
<disabled>
<colorrole role="Base">
<brush brushstyle="SolidPattern">
<color alpha="255">
<red>132</red>
<green>239</green>
<blue>240</blue>
</color>
</brush>
</colorrole>
<colorrole role="Window">
<brush brushstyle="SolidPattern">
<color alpha="255">
<red>132</red>
<green>239</green>
<blue>240</blue>
</color>
</brush>
</colorrole>
</disabled>
</palette>
</property>
<property name="windowTitle">
<string>平均绩点计算器</string>
</property>
<property name="windowIcon">
<iconset resource="icon.qrc">
<normaloff>:/cal.ico</normaloff>:/cal.ico</iconset>
</property>
<widget class="QWidget" name="centralWidget">
<layout class="QGridLayout" name="gridLayout">
<item row="1" column="3">
<widget class="QLabel" name="label_2">
<property name="text">
<string>绩点</string>
</property>
</widget>
</item>
<item row="0" column="0">
<widget class="QLabel" name="label_3">
<property name="text">
<string>平均绩点：</string>
</property>
</widget>
</item>
<item row="0" column="2">
<widget class="QLabel" name="pjjd">
<property name="text">
<string>等待计算</string>
</property>
</widget>
</item>
<item row="0" column="4">
<widget class="QPushButton" name="add">
<property name="text">
<string>增加</string>
</property>
</widget>
</item>
<item row="3" column="4">
<widget class="QPushButton" name="cal">
<property name="text">
<string>计算</string>
</property>
</widget>
</item>
<item row="1" column="1">
<widget class="QLabel" name="label">
<property name="text">
<string>学分</string>
</property>
</widget>
</item>
<item row="2" column="0" colspan="4">
<widget class="QScrollArea" name="scrollArea">
<property name="widgetResizable">
<bool>true</bool>
</property>
<widget class="QWidget" name="scrollAreaWidgetContents">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>398</width>
<height>252</height>
</rect>
</property>
<layout class="QHBoxLayout" name="horizontalLayout">
<item>
<layout class="QVBoxLayout" name="VLX">
<item>
<widget class="QLineEdit" name="LEX1">
<property name="text">
<string/>
</property>
</widget>
</item>
<item>
<widget class="QLineEdit" name="LEX2"/>
</item>
</layout>
</item>
<item>
<layout class="QVBoxLayout" name="VLJ">
<item>
<widget class="QLineEdit" name="LEJ1"/>
</item>
<item>
<widget class="QLineEdit" name="LEJ2"/>
</item>
</layout>
</item>
</layout>
<zorder></zorder>
<zorder></zorder>
</widget>
</widget>
</item>
</layout>
<zorder>label_2</zorder>
<zorder>label_3</zorder>
<zorder>pjjd</zorder>
<zorder>add</zorder>
<zorder>cal</zorder>
<zorder>label</zorder>
<zorder>scrollArea</zorder>
</widget>
<widget class="QMenuBar" name="menuBar">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>520</width>
<height>23</height>
</rect>
</property>
</widget>
<widget class="QToolBar" name="mainToolBar">
<attribute name="toolBarArea">
<enum>TopToolBarArea</enum>
</attribute>
<attribute name="toolBarBreak">
<bool>false</bool>
</attribute>
</widget>
<widget class="QStatusBar" name="statusBar"/>
</widget>
<layoutdefault spacing="6" margin="11"/>
<resources>
<include location="icon.qrc"/>
</resources>
<connections/>
</ui>
main,cpp
#include <QtGui/QApplication>
#include "mainwindow.h"
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}