Qt考试要点(期中)

1、qt考试要点(期中)计算器zhu.h#include55.hclass computer :public qwidget,private *parent):qwidget (parent) setupui(this); input1=0; input2=0; g=0;ui_form q_objectpublic:computer(qwidget *parent=0); int fuhao; int g;qstring input1; qstring input2; public slots:void on_bt_0_clicked(); void on_bt_1_clicked(); void

2、 on_bt_2_clicked(); void on_bt_3_clicked(); void on_bt_4_clicked(); void on_bt_5_clicked(); void on_bt_6_clicked(); void on_bt_7_clicked(); void on_bt_8_clicked(); void on_bt_9_clicked(); void on_bt_dot_clicked();void on_bt_che_clicked(); void on_bt_chu_clicked(); void on_bt_jia_clicked(); void on_b

3、t_jian_clicked(); void on_bt_sum_clicked(); void on_bt_back_clicked(); void on_bt_c_clicked(); void on_bt_quit_clicked(); ;zhu.cpp#includezhu.hcomputer:computer(qwidgetfuhao=0;lineedit-setalignment(qt:alignright); /*connect(bt_0,signal(clicked(),this,slot(bt_0_clicked();connect(bt_1,signal(clicked()

4、,this,slot(bt_1_clicked();connect(bt_2,signal(clicked(),this,slot(bt_2_clicked();connect(bt_3,signal(clicked(),this,slot(bt_3_clicked();connect(bt_4,signal(clicked(),this,slot(bt_4_clicked();connect(bt_5,signal(clicked(),this,slot(bt_5_clicked();connect(bt_6,signal(clicked(),this,slot(bt_6_clicked()

5、;connect(bt_7,signal(clicked(),this,slot(bt_7_clicked();connect(bt_8,signal(clicked(),this,slot(bt_8_clicked();connect(bt_9,signal(clicked(),this,slot(bt_9_clicked(); */ void computer:on_bt_0_clicked() if(input2=0)input2=0;else input2=lineedit-text(); input2.append(0); lineedit-settext(input2); void

6、 computer:on_bt_1_clicked() if(input2=0)input2=1; else input2=lineedit-text(); input2.append(1); lineedit-settext(input2); void computer:on_bt_2_clicked() if(input2=0)input2=2; else input2=lineedit-text(); input2.append(2); lineedit-settext(input2); void computer:on_bt_3_clicked() if(input2=0)input2

7、=3; else input2=lineedit-text(); input2.append(3); lineedit-settext(input2); void computer:on_bt_4_clicked() if(input2=0)input2=4; else input2=lineedit-text(); input2.append(4); lineedit-settext(input2); void computer:on_bt_5_clicked() if(input2=0)input2=5; else input2=lineedit-text(); input2.append

8、(5); lineedit-settext(input2); void computer:on_bt_6_clicked() if(input2=0)input2=6; else input2=lineedit-text(); input2.append(6); lineedit-settext(input2); void computer:on_bt_7_clicked() if(input2=0)input2=7; else input2=lineedit-text(); input2.append(7); lineedit-settext(input2); void computer:o

9、n_bt_8_clicked() if(input2=0)input2=8; else input2=lineedit-text();input2.append(8); lineedit-settext(input2); void computer:on_bt_9_clicked() if(input2=0)input2=9; else input2=lineedit-text(); input2.append(9); lineedit-settext(input2); void computer:on_bt_dot_clicked() if(g=0)if(input2=0)input2=0.

10、; else input2=lineedit-text(); input2.append(.); g+;lineedit-settext(input2); void computer:on_bt_che_clicked() g=0;double n,m;input2=lineedit-text(); if(fuhao=0) input1=input2; input2=0;fuhao=3; else n=input1.todouble(); m=input2.todouble(); if(fuhao=1)n=n+m; if(fuhao=2)n=n-m; if(fuhao=3)n=n*m;if(f

11、uhao=4&m!=0)n=n/m; input1 = qstring:number(n,f,10); if(fuhao=4&m=0) input1=error; input2 = 0; fuhao = 3;lineedit-settext(input1); void computer:on_bt_chu_clicked() g=0;double n,m;input2=lineedit-text(); if(fuhao=0) input1=input2; input2=0;fuhao=4; else n=input1.todouble(); m=input2.todouble(); if(fu

12、hao=1) n=n+m; if(fuhao=2) n=n-m; if(fuhao=3) n=n*m;if(fuhao=4&m!=0) n=n/m; input1 = qstring:number(n,f,10); if(fuhao=4&m=0) input1=error; input2 = 0; fuhao = 4;lineedit-settext(input1); void computer:on_bt_jia_clicked() g=0;double n,m;input2=lineedit-text(); if(fuhao=0) input1=input2; input2=0;fuhao

13、=1; else n=input1.todouble(); m=input2.todouble(); if(fuhao=1)n=n+m; if(fuhao=2)n=n-m; if(fuhao=3)n=n*m;if(fuhao=4&m!=0)n=n/m; input1 = qstring:number(n,f,10); if(fuhao=4&m=0) input1=error; input2 = 0; fuhao = 1;lineedit-settext(input1); void computer:on_bt_jian_clicked() g=0;double n,m;input2=linee

14、dit-text(); if(fuhao=0) input1=input2; input2=0;fuhao=2; else n=input1.todouble(); m=input2.todouble(); if(fuhao=1)n=n+m; if(fuhao=2)n=n-m; if(fuhao=3)n=n*m;if(fuhao=4&m!=0)n=n/m; input1 = qstring:number(n,f,10); if(fuhao=4&m=0) input1=error; input2 = 0; fuhao = 2; lineedit-settext(input1); void com

15、puter:on_bt_sum_clicked() g=0;double n,m;input2=lineedit-text(); if(fuhao=0) input1=input2; input2=0;fuhao=5; else n=input1.todouble(); m=input2.todouble(); if(fuhao=1)n=n+m; if(fuhao=2)n=n-m; if(fuhao=3)n=n*m;if(fuhao=4&m!=0)n=n/m; input1 = qstring:number(n,g,10); if(fuhao=4&m=0) input1=error; inpu

16、t2 = 0; fuhao = 0;lineedit-settext(input1); input1=0; void computer:on_bt_back_clicked() g=0;if(input2=0) input2=0; else lineedit-backspace(); void computer:on_bt_c_clicked() g=0;input1=0;input2=0; fuhao=0;lineedit-settext(input2); void computer:on_bt_quit_clicked() qapplication *app; app-quit(); ma

17、in.cpp#include /#include /#include55.h #includezhu.hint main(int argc,char *argv) qapplication app(argc,argv); /qtextcodec:setcodecfortr(qtextcodec:codecforname(gb2312); computer form; / ui_form ui;/ ui.setupui(pwidget); form.show();return app.exec(); 画图image zhu.cpp#include p.hpicture:picture(qwidg

18、et *) void picture:paintevent(qpaintevent *) qimage img(./2.jpg); qrect rect(0,0,400,500); qpainter painter(this);painter.drawimage(rect,img); zhu.h #include #includeclass picture:public qwidget q_object public:picture(qwidget *parent =0); private:void paintevent(qpaintevent *event); qimage *img; qr

19、ect *rect;qpainter *painter; ;main.cpp#includep.h#includeint main(int argc,char *argv) qapplication app(argc,argv); picture p; p.show();return app.exec(); 画图label zhu.h#include #include#includeclass label:public qwidget q_object public:label(qwidget *parent = 0); private:qlabel *lb; qpixmap *pix; qh

20、boxlayout *ly; ;zhu.cpp#includezhu.hlabel:label(qwidget *parent) lb = new qlabel;qpixmap pix(./1.jpg); lb-setpixmap(pix); ly = new qhboxlayout; ly-addwidget(lb); setlayout(ly); main.cpp#include #includezhu.hint main(int argc,char *argv) qapplication app(argc,argv); label k; k.show();return app.exec(

21、); 画图，线 zhu.h#includeclass draw:public qwidget q_object public:draw(qwidget * = 0 ); private:void paintevent(qpaintevent *event); ;zhu.cpp#includedl.hdraw:draw(qwidget *) void draw:paintevent(qpaintevent *) qpainter painter(this);qpen pen(qt:red,4,qt:dotline); painter.setpen(pen);painter.drawline(10

22、,10,200,200); main.cpp（略）密码与用户 zhu.h#include #include #include #include #include #includeclass rj4:public qwidget q_object; public:rj4(qwidget *parent=0); public slots: void duibi(); private:qpushbutton *bt; qlineedit *le1; qlineedit *le2; qlabel *lb1; qlabel *lb2; qlabel *lb3;/ qlabel *lb4; qgridla

23、yout *layout; qstring name;qstring passwd; int count; ;zhu.cpp #includet.hrj4:rj4(qwidget *parent):qwidget(parent) bt=new qpushbutton(true);lb1=new qlabel(please input user:); lb2=new qlabel(please input passwd:); lb3=new qlabel(); le1=new qlineedit(); le2=new qlineedit();le2-setechomode(qlineedit:p

24、assword);layout=new qgridlayout(this); layout-addwidget(lb1,0,0,0); layout-addwidget(lb2,1,0,0); layout-addwidget(le1,0,1,0); layout-addwidget(le2,1,1,0); layout-addwidget(bt,2,1,0); layout-addwidget(lb3,3,0,0); / layout-addwidget(lb4,3,0,0); name=root;passwd=123456; count=0;connect(bt,signal(clicke

25、d(),this,slot(duibi(); void rj4:duibi() count +;if(qstring:compare(name,le1-text()!=0) lb3-settext(username error!you have+qstring:number(3-count)+times left!); else if(qstring:compare(passwd,le2-text()!=0) lb3-settext(passwd error!youhave+qstring:number(3-count)+times left!); else lb3-settext(welco

26、m!); if(count=3) exit(0); main.cpp（略） 门控/门进系统.h文件 #include #include #include #include #include #include #include #includeclass doorcontrol:public qwidget q_object public:doorcontrol(qwidget *parent=0);public slots:void on_bt0_clicked(); void on_bt1_clicked(); void on_bt2_clicked(); void on_bt3_click

27、ed(); void on_bt4_clicked(); void on_bt5_clicked(); void on_bt6_clicked(); void on_bt7_clicked();void on_bt8_clicked(); void on_bt9_clicked();void on_backspace_clicked(); void on_ok_clicked(); private:qpushbutton*bt0,*bt1,*bt2,*bt3,*bt4,*bt5,*bt6,*bt7,*bt8,*bt9,*backspace,*ok; qlabel *lb; qlineedit

28、*le; qhboxlayout*hlayout0,*hlayout1,*hlayout; qvboxlayout*vlayout0,*vlayout1,*vlayout2,*vlayout3,*vlayout4,*vlayout5,*vlayout; qpixmap *pixmap; ;/门进系统.cpp文件#include doorcontrol.h #include qstring value; int num;doorcontrol:doorcontrol(qwidget *parent):qwidget(parent) lb =new qlabel; le = new qlineed

29、it;le-setalignment(qt:alignright);/设置文本框为右对齐le-setreadonly(0);/设置文本框为只读le-setmaxlength(8);/设置文本框显示数字个数 /le-setechomode(qlineedit:noecho);le-setechomode(qlineedit:password);bt0 = new qpushbutton(0); bt1 = new qpushbutton(1); bt2 = new qpushbutton(2); bt3 = new qpushbutton(3); bt4 = new qpushbutton(4)

30、; bt5 = new qpushbutton(5); bt6 = new qpushbutton(6); bt7 = new qpushbutton(7); bt8 = new qpushbutton(8); bt9 = new qpushbutton(9); backspace = new qpushbutton(backspace);ok = new qpushbutton(ok);hlayout0 = new qhboxlayout; hlayout1 = new qhboxlayout; vlayout = new qvboxlayout; vlayout0 = new qvboxl

31、ayout; vlayout1 = new qvboxlayout; vlayout2 = new qvboxlayout; vlayout3 = new qvboxlayout; vlayout4 = new qvboxlayout; vlayout5 = new qvboxlayout;vlayout0-addwidget(bt7); vlayout0-addwidget(bt4); vlayout0-addwidget(bt1); vlayout0-addwidget(bt0);vlayout1-addwidget(bt8); vlayout1-addwidget(bt5); vlayo

32、ut1-addwidget(bt2);vlayout1-addwidget(backspace);vlayout2-addwidget(bt9); vlayout2-addwidget(bt6); vlayout2-addwidget(bt3); vlayout2-addwidget(ok);hlayout1-addlayout(vlayout0);hlayout1-addlayout(vlayout1);hlayout1-addlayout(vlayout2);vlayout-addwidget(lb); vlayout-addwidget(le);vlayout-addlayout(hla

33、yout1); ,slot(on_ok_clicked(); void doorcontrol:on_bt0_clicked() le-insert(0); this-setlayout(vlayout);connect(bt0,signal(clicked(),this,slot(on_bt0_clicked();connect(bt1,signal(clicked(),this,slot(on_bt1_clicked();connect(bt2,signal(clicked(),this,slot(on_bt2_clicked();connect(bt3,signal(clicked(),

34、this,slot(on_bt3_clicked();connect(bt4,signal(clicked(),this,slot(on_bt4_clicked();connect(bt5,signal(clicked(),this,slot(on_bt5_clicked();connect(bt6,signal(clicked(),this,slot(on_bt6_clicked();connect(bt7,signal(clicked(),this,slot(on_bt7_clicked();connect(bt8,signal(clicked(),this,slot(on_bt8_cli

35、cked();connect(bt9,signal(clicked(),this,slot(on_bt9_clicked();connect(backspace,signal(clicked(),this,slot(on_backspace_clicked();connect(ok,signal(clicked(),thisvoid doorcontrol:on_bt1_clicked() le-insert(1); void doorcontrol:on_bt2_clicked() le-insert(2); void doorcontrol:on_bt3_clicked() le-inse

36、rt(3); void doorcontrol:on_bt4_clicked() le-insert(4); void doorcontrol:on_bt5_clicked() le-insert(5); void doorcontrol:on_bt6_clicked() le-insert(6); void doorcontrol:on_bt7_clicked() le-insert(7); void doorcontrol:on_bt8_clicked() le-insert(8); void doorcontrol:on_bt9_clicked() le-insert(9); voidd

37、oorcontrol:on_backspace_clicked() le-backspace(); void doorcontrol:on_ok_clicked() qstring temp; lb-clear();value = le-text(); /num = value.toint(); /if(num=123456)if(pare(value,”12345”) pixmap = new qpixmap(./1.jpg);lb-setpixmap(*pixmap); else pixmap = new qpixmap(./0.jpg);lb-setpixmap(*pixmap); /m

38、ain文件#include #include doorcontrol.hint main(int argc,char *argv) painter.setpen(qt:dotline);painter.setbrush(qbrush(qt:blue); painter.drawline(10, 10, 100, 10);painter.drawroundrect(10, 80, 100, 50); painter.drawrect(10, 20, 100, 50);qapplication app(argc,argv); doorcontrol doorcontrol; doorcontrol

39、.show(); return app.exec();c29c91afe4ced1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c8795ad9c91fe4ced1b6c8795ad29c91afedd1b6c87d1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c8795ad9c91fe4ced1b6c8795ad29c91af95ad9c91afe4ced1b6c8795ad91afe4ced1b6c8795ad9d1b6c8795ad9c91afe4ced1b6c8795a1afe4ced1b6c8795ad91

40、afe4ced1b6c8795ad9c91fe4ced1b6c8795ad29c91afc91fe4ced1d1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6cd1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c8795ad9c91fe4ced1b6c8795ad29c91af8795ad9c91fe4ced1d1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c87d1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c8795ad9c91fe4c

41、ed1b6c8795ad29c91af5d1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c8795ad9c91fe4ced1b6c8795ad29c91afad9c91fe4ced1b6c8795ad29c91afb6c8795ad29c91afb6c8795ad29c91afd1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6d1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c8795ad9c91d1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1

42、b6c8795ad9c91fe4ced1b6c8795ad29c91affe4ced1b6c8795ad29c91afc8795ad9c91fe4ced1b6c8795ad29c91afd1b6c8795ad9c91afed1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c8d1b6c8795ad9c91afe4ced1d91afe4ced1b6c8795ad9c91fe4ced1b6c8795ad29c91afc91fe4ced1d1b6c871afe4ced1b6c8795ad91afe4ced1b6c8795ad9c91fe4ced1b6c8795a

43、d29c91afc91fe4ced1d1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6cd1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c8795ad9c91fe4ced1b6c8795ad29c91af8795ad9c91fe4ced1d1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c87d1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c8795ad9c91fe4ced1b6c8795ad29c91af5d1b6c8795ad9c91a

44、fe4ced1b6c8795ad91afe4ced1b6c8795ad9c91fe4ced1b6c8795ad29c91afad9c91fe4ced1b6c8795ad29c91afb6c8795ad29c91afb6c8795ad29c91afd1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6d1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c8791afe4ced1b6c8795ad91afe4ced1b6c8795ad9c91fe4ced1b6c8795ad29c91afc91fe4ced1d1b6c8795ad

45、9c91afe4ced1b6c8795ad91afe4ced1b6cd1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c8795ad9c91fe4ced1b6c8795ad29c91af8795ad9c91fe4ced1d1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c87d1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c8795ad9c91fe4ced1b6c8795ad29c91af5d1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c

46、8795ad9c91fe4ced1b6c8795ad29c91afad9c91fe4ced1b6c8795ad29c91afb6c8795ad29c91afb6c8795ad29c91afd1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6d1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c8795ad9c91d1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c8795ad9c91fe4ced1b6c8795ad29c91affe4ced1b6c8795ad29c91afc8795a

47、d9c91fe4ced1b6c8795ad29c91afd1b6c8795ad9c91afed1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c8d1b6c8795ad9c91afe4ced15ad9c91d1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c8795ad9c91fe4ced1b6c8795ad29c91affe4ced1b6c8795ad29c91afc8795ad9c91fe4ced1b6c8795ad29c91afd1b6c8795ad9c91afed1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c8d1b6c8795ad9c91afe4ced195ad9c91afe4ced1b6c8795ad91afe4ced1b6