文件名称:CountTime.tar
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计算时间有两种方式，一种就是通过描述计算时分秒，然后再输出到界面上，
一种是通过QTime类和QTime类相结合的方式，计算出时间的值。
但是，需要在界面上加上一个名为qpushbutton的类，另一个要加入两个名字分别为
lineEdit_1和lineEdit_2的类。(The computation time in two ways, one is described by the calculation of every minute, and then output to the interface,
One is to compute the value of time by combining the QTime class with the QTime class.
However, you need to add a class called QPushButton on the interface, and the other will add two names
Classes of lineEdit_1 and lineEdit_2.)
一种是通过QTime类和QTime类相结合的方式，计算出时间的值。
但是，需要在界面上加上一个名为qpushbutton的类，另一个要加入两个名字分别为
lineEdit_1和lineEdit_2的类。(The computation time in two ways, one is described by the calculation of every minute, and then output to the interface,
One is to compute the value of time by combining the QTime class with the QTime class.
However, you need to add a class called QPushButton on the interface, and the other will add two names
Classes of lineEdit_1 and lineEdit_2.)
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