求ptqt+python编写的计算器程序，支持键盘输入，急用，谢谢

#!/usr/bin/env python

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from PyQt4 import QtCore, QtGui

from ui_calculatorform import Ui_CalculatorForm

class CalculatorForm(QtGui.QWidget):

def __init__(self, parent=None):

super(CalculatorForm, self).__init__(parent)

self.ui = Ui_CalculatorForm()

self.ui.setupUi(self)

@QtCore.pyqtSlot(int)

def on_inputSpinBox1_valueChanged(self, value):

self.ui.outputWidget.setText(str(value + self.ui.inputSpinBox2.value()))

@QtCore.pyqtSlot(int)

def on_inputSpinBox2_valueChanged(self, value):

self.ui.outputWidget.setText(str(value + self.ui.inputSpinBox1.value()))

if __name__ == '__main__':

import sys

app = QtGui.QApplication(sys.argv)

calculator = CalculatorForm()

calculator.show()

sys.exit(app.exec_())

1、通过调用Linux C 函数

    system("calc.exe")

2、通过QProcess 阻塞调用

    QProcess::execute("calc.exe")/QProcess::startDetached("calc.exe")

3、通过QProcess，非阻塞调用

    QProcess *pro = new QProcess

    pro->start("calc.exe")

注释：

1、前两种方法会阻塞进程，直到计算器程序结束，而第三种方法则不会阻塞进程，可以多任务运行。

2、QT在运行的时候，要启动qws服务，如果用前两种方法，运行的时候，要新开启一个qws，否则不能运行；而第三种方法，则不需要在开启qws，他和主进程公用一个qws。

3、第三种虽然不会阻塞，但是有可能在终端上看不到打印出来的信息。所以要在终端显示信息，可以考虑阻塞模式。

如果只做四个简单的运算这应应该可以

shell脚本代码如下：

#!/bin/bash

read -p "input num1:" a

read -p "input num2:" b

read -p "input operator:" o

case $o in

+) let "res=a + b"

echo $res

-) let "res=a - b"

echo $res

/) awk 'BEGIN{printf "%.2f\n",'$a'/'$b'}'

*) let "res=a * b"

echo $res

esac

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