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How to click two label controls in QT to subtract the customized numbers in the control

2022-02-02 19:11:15 【CSDN Q & A】

There are multiple label controls with different numbers （ Contains only numbers ）, Click two tab controls in turn , Realize the subtraction of custom numbers in two label controls , Then save the result and put it into one of the two tags , Repeat until there is only one number left



Refer to the answer 1：

Implement the click message of the label control , Get the content of the tag , Convert to plastic , After successful subtraction, set it to the label .



Refer to the answer 2：


Refer to the answer 3：

Same as 1 floor , First, we need to implement the click event of the label control . If there is no problem with this, you can complete the following contents .
1. Define two global numeric variables , for example int numFirst=0,int numSecond =0;
2. Define a tab click count clickedCount=0;
3. Click the tab once , In the tag event clickedCount+1; At the same time, judge if clickedCount==1, Will numFirst = label.Text().toInt();, if clickedCount==2, Then assign numSecond , At the same time clickedCount Zeroing , And make a difference between the two numbers , Set the of one of the labels text by “”（ empty ）; Set another label number to difference .



Refer to the answer 4：

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