2017浙大远程《数据库应用程序的设计》离线作业

/XX大学远程教育学院《数据库应用程序设计》课程作业姓名：学号：年级：学习中心：—————————————————————————————作业第一章1.5如何保存Delphi的项目？尝试自己动手创建一个项目,并保存。答：执行File|Save

All菜单命令或单击工具栏中的Save

All按钮便可保存,在保存时可以对工程文件和单元文件进行改名,但后缀名不能改。保存文件之后,单击工具中的Run按钮或按F9键,系统将开始编译、连接、运行该工程。1.7尝试设计如图1－10所示的窗体。〔图见教材P15页图1－10图1－10第二章2.8设计如图2－5所示的界面。单击"按钮1”或"按钮2”时在标签上显示用户所执行的操作。单击"开启/停用按钮"可控制"按钮1”和"按钮2”是否可用,单击"退出系统"按钮时,结束程序的运行。2.9设计如图2－6所示的界面。当单击按钮时,可控制文本框中字体的颜色。图2－5 图2－6

unit

test;

interface

uses

Windows,

Messages,

SysUtils,

Variants,

Classes,

Graphics,

Controls,

Forms,

Dialogs,

StdCtrls;

type

TForm1

=

class<TForm>

showLabel:

TLabel;

btn1:

TButton;

//按钮1

btn2:

TButton;

//按钮2

ctlBtn:

TButton;

//开启停用按钮exitBtn:

TButton;

//退出按钮procedure

btn1Click<Sender:

TObject>;

procedure

btn2Click<Sender:

TObject>;

procedure

exitBtnClick<Sender:

TObject>;

procedure

ctlBtnClick<Sender:

TObject>;

private

{

Private

declarations

}

public

{

Public

declarations

}

end;

var

Form1:

TForm1;

ctlStatus:integer

=

0;

//控制按钮1和2的开启和关闭,0表示当前为开启,1表示关闭implementation

{$R

*.dfm}

procedure

TForm1.btn1Click<Sender:

TObject>;begin

form1.showLabel.Caption

:=

'您点击了按钮1';

end;

procedure

TForm1.btn2Click<Sender:

TObject>;

begin

form1.showLabel.Caption

:=

'您点击了按钮2';

end;

procedure

TForm1.exitBtnClick<Sender:

TObject>;

begin

form1.Close;

end;

procedure

TForm1.ctlBtnClick<Sender:

TObject>;

begin

if

ctlStatus

=

0

then

begin

form1.btn1.Enabled

:=

false;

form1.btn2.Enabled

:=

false;

ctlStatus

:=

1;

end

else

begin

form1.btn1.Enabled

:=

true;

form1.btn2.Enabled

:=

true;

ctlStatus

:=

0;

end;

end;

end.

2.9:unit

test;

interface

uses

Windows,

Messages,

SysUtils,

Variants,

Classes,

Graphics,

Controls,

Forms,

Dialogs,

StdCtrls;

type

TForm1

=

class<TForm>

Label1:

TLabel;

Edit1:

TEdit;

btnRed:

TButton;

btnGreen:

TButton;

btnBlue:

TButton;

procedure

btnRedClick<Sender:

TObject>;

procedure

btnGreenClick<Sender:

TObject>;

procedure

btnBlueClick<Sender:

TObject>;

private

{

Private

declarations

}

public

{

Public

declarations

}

end;

var

Form1:

TForm1;

implementation

{$R

*.dfm}

procedure

TForm1.btnRedClick<Sender:

TObject>;

begin

form1.Edit1.Font.Color

:=

clred;end;

procedure

TForm1.btnGreenClick<Sender:

TObject>;

begin

form1.Edit1.Font.Color

:=

clgreen;

end;

procedure

TForm1.btnBlueClick<Sender:

TObject>;

begin

form1.Edit1.Font.Color

:=

clblue;

end;

end.第三章3.8下列实数中哪些是合法的,哪些是不合法的？不合法的请说明理由。〔A0.25E+02 〔B.25+2 〔C25E+2〔D34.5 〔E.123 〔F-3E-4〔A合法,即为25

〔B不合法,小数点前必须有数字,如表示为0.25+2

〔C合法,即为2500

〔D合法,即为34.5

〔E不合法,同〔2

〔F合法,即为‐0.0003

3.12数学式子sin30。写成Delphi表达式是下列哪个？〔ASin30 〔BSin<30> 〔CSIN〔30。〔DSin<30*Pi/180>D,需要把角度转化为弧度第四章4.7利用3个数字编辑框分别输入小时、分、秒,换算共有多少秒,然后使用标签输出。unit

test;

interface

uses

Windows,

Messages,

SysUtils,

Variants,

Classes,

Graphics,

Controls,

Forms,

Dialogs,

StdCtrls,

Spin;

type

TForm1

=

class<TForm>

SpinEdit1:

TSpinEdit;

Label1:

TLabel;

Label2:

TLabel;

SpinEdit2:

TSpinEdit;

Label3:

TLabel;

SpinEdit3:

TSpinEdit;

Label4:

TLabel;

procedure

SpinEdit1Change<Sender:

TObject>;

procedure

SpinEdit2Change<Sender:

TObject>;

procedure

SpinEdit3Change<Sender:

TObject>;

private

{

Private

declarations

}

procedure

CalculateTimeToSencond<timeKind:String;

time:integer>;

public

{

Public

declarations

}

end;

var

Form1:

TForm1;

hour:

integer

=

0;

minute:

integer

=

0;

second:

integer

=

0;

tot:integer

=

0;

implementation

{$R

*.dfm}

procedure

TForm1.CalculateTimeToSencond<timeKind:String;

time:integer>;

begin

if

timeKind

=

'hh'

then

hour

:=

time

else

if

timeKind

=

'mi'

then

minute

:=

time

else

if

timeKind

=

'ss'

then

second

:=

time;

tot

:=

hour

*

60

*

60

+

minute

*

60

+

second;

form1.Label4.Caption

:=

'总共为'

+

IntToStr<tot>

+

'秒';

end;

procedure

TForm1.SpinEdit1Change<Sender:

TObject>;

begin

Form1.CalculateTimeToSencond<'hh',

StrToInt<Form1.SpinEdit1.Text>>;

end;

procedure

TForm1.SpinEdit2Change<Sender:

TObject>;

begin

Form1.CalculateTimeToSencond<'mi',

StrToInt<Form1.SpinEdit2.Text>>;

end;

procedure

TForm1.SpinEdit3Change<Sender:

TObject>;

begin

Form1.CalculateTimeToSencond<'ss',

StrToInt<Form1.SpinEdit3.Text>>;

end;

end.

4.8在编辑框中输入一个实数,利用备注框输出该实数及其平方和平方根。unit

Unit1;

interface

uses

Windows,

Messages,

SysUtils,

Variants,

Classes,

Graphics,

Controls,

Forms,

Dialogs,

StdCtrls;

type

TForm1

=

class<TForm>

Edit1:

TEdit;

Label1:

TLabel;

Memo1:

TMemo;

Label2:

TLabel;

procedure

Edit1Change<Sender:

TObject>;

private

{

Private

declarations

}

public

{

Public

declarations

}

end;

var

Form1:

TForm1;

num1

:

Real;

//原实数

num2

:

Real;

//实数平方num3

:

Real;

//实数平方根

implementation

{$R

*.dfm}

procedure

TForm1.Edit1Change<Sender:

TObject>;

begin

if

form1.Edit1.Text

<>

''

then

begin

num1

:=

StrToFloat<form1.Edit1.Text>;

num2

:=

Sqr<num1>;

num3

:=

Sqrt<num1>;

form1.Memo1.Lines.Clear;

form1.Memo1.Lines.Add<'实数为

:

'

+

FloatToStr<num1>>;

form1.Memo1.Lines.Add<'平方为

:

'

+

FloatToStr<num2>>;

form1.Memo1.Lines.Add<'平方根为

:

'

+

FloatToStr<num3>>;

end;

end;

end.第五章5.11任意给定3个实数,按照从大到小的顺序依次输出这3个数。unit

Unit1;

interface

uses

Windows,

Messages,

SysUtils,

Variants,

Classes,

Graphics,

Controls,

Forms,

Dialogs,

StdCtrls;

type

TForm1

=

class<TForm>

num1Edit:

TEdit;

Label1:

TLabel;

Label2:

TLabel;

resultLabel:

TLabel;

num2Edit:

TEdit;

num3Edit:

TEdit;

procedure

num1EditChange<Sender:

TObject>;

procedure

num2EditChange<Sender:

TObject>;

procedure

num3EditChange<Sender:

TObject>;

private

{

Private

declarations

}

procedure

CompareNumber<>;

public

{

Public

declarations

}

end;

var

Form1:

TForm1;

num1

:

Real;

//数字1

num2

:

Real;

//数字2

num3

:

Real;

//数字3

compnum

:

Real;

//比较时转换2数outStr

:

String;

//输出结果;

implementation

{$R

*.dfm}

procedure

TForm1.CompareNumber<>;

begin

if

<trim<form1.num1Edit.Text>

<>

''>

And

<trim<form1.num2Edit.Text>

<>

''>

And

<trim<form1.num3Edit.Text>

<>

''>

then

begin

num1

:=

StrToFloat<form1.num1Edit.Text>;

num2

:=

StrToFloat<form1.num2Edit.Text>;

num3

:=

StrToFloat<form1.num3Edit.Text>;

if

num2

>

num1

then

begin

compnum

:=

num1;

num1

:=

num2;

num2

:=

compnum;

end;

if

num3

>

num1

then

begin

compnum

:=

num1;

num1

:=

num3;

num3

:=

compnum;

end;

if

num3

>

num2

then

begin

compnum

:=

num2;

num2

:=

num3;

num3

:=

compnum;

end;

outStr

:=

FloatToStr<num1>

+

','

+

FloatToStr<num2>

+

','

+

FloatToStr<num3>;

form1.resultLabel.Caption

:=

outStr;

end;

end;

procedure

TForm1.num1EditChange<Sender:

TObject>;

begin

form1.CompareNumber;

end;

procedure

TForm1.num2EditChange<Sender:

TObject>;

begin

form1.CompareNumber;

end;

procedure

TForm1.num3EditChange<Sender:

TObject>;

begin

form1.CompareNumber;

end;

end.

5.13假设工资的增幅标准为：若基本工资大于等于1000元,增加工资20%；若小于1000元大于等于800元,则增加工资15%；若小于800元,则增加工资10%。请根据用户在文本框中输入的基本工资,计算出增加后的工资。unit

Unit1;

interface

uses

Windows,

Messages,

SysUtils,

Variants,

Classes,

Graphics,

Controls,

Forms,

Dialogs,

StdCtrls;

type

TForm1

=

class<TForm>

Label1:

TLabel;

Edit1:

TEdit;

Label2:

TLabel;

resultLabel:

TLabel;

procedure

Edit1Change<Sender:

TObject>;

private

{

Private

declarations

}

public

{

Public

declarations

}

end;

var

Form1:

TForm1;

salary:

Real;

outSalary:

Real;

implementation

{$R

*.dfm}

procedure

TForm1.Edit1Change<Sender:

TObject>;

begin

salary

:=

StrToFloat<form1.Edit1.Text>;

if

<salary

>=

1000>

then

outSalary

:=

salary

*

<1

+

0.2>

else

if

<salary

<

1000>

And

<salary

>=

800>

then

outSalary

:=

salary

*

<1

+

0.15>

else

if

<salary

<

800>

then

outSalary

:=

salary

*

<1

+

0.1>;

form1.resultLabel.Caption

:=

FloatToStr<outSalary>;

end;

end.

第六章6.5设s=1X2X3X…Xn,求s不大于20000时最大的n。unit

Unit1;

interface

uses

Windows,

Messages,

SysUtils,

Variants,

Classes,

Graphics,

Controls,

Forms,

Dialogs,

StdCtrls;

type

TForm1

=

class<TForm>

Label1:

TLabel;

Edit1:

TEdit;

Label2:

TLabel;

resultLabel:

TLabel;

procedure

FormCreate<Sender:

TObject>;

private

{

Private

declarations

}

public

{

Public

declarations

}

end;

var

Form1:

TForm1;

number,

n,

tot:

Integer;

implementation

{$R

*.dfm}

procedure

TForm1.FormCreate<Sender:

TObject>;

begin

tot

:=

1;

n

:=

0;

number

:=

StrToInt<form1.Edit1.Text>;

While

tot

<=

number

do

begin

n

:=

n

+

1;

tot

:=

tot

*

n;

end;

form1.resultLabel.Caption

:=

IntToStr<n‐1>;

end;

end.

6.10在标签上输出100~200之间的所有的奇数,其中3的倍数除外。unit

Unit1;

interface

uses

Windows,

Messages,

SysUtils,

Variants,

Classes,

Graphics,

Controls,

Forms,

Dialogs,

StdCtrls;

type

TForm1

=

class<TForm>

resultLabel:

TLabel;

procedure

FormCreate<Sender:

TObject>;

private

{

Private

declarations

}

public

{

Public

declarations

}

end;

var

Form1:

TForm1;

number,

i:

Integer;

outStr:

String;

implementation

{$R

*.dfm}

procedure

TForm1.FormCreate<Sender:

TObject>;

begin

for

i:=

100

to

200

do

begin

if

i

mod

2

<>

0

then

if

i

mod

3

<>

0

then

outStr

:=

outStr

+

'

'

+

IntToStr<i>;

form1.resultLabel.Caption

:=

outStr;

end;

end;

end.第七章7.4求1~200这200个数的和,当和大于10000时结束计算。〔要求使用转向语句unit

Unit1;

interface

uses

Windows,

Messages,

SysUtils,

Variants,

Classes,

Graphics,

Controls,

Forms,

Dialogs,

StdCtrls;

type

TForm1

=

class<TForm>

Label1:

TLabel;

procedure

FormCreate<Sender:

TObject>;

private

{

Private

declarations

}

public

{

Public

declarations

}

end;

var

Form1:

TForm1;

sum,

n

:

integer;

implementation

{$R

*.dfm}

procedure

TForm1.FormCreate<Sender:

TObject>;

begin

sum

:=

0;

n

:=

0;

repeat

n

:=

n

+

1;

sum

:=

sum

+

n;

if

<sum

>

10000>

then

break;

until

n

>=

200;

form1.Label1.Caption

:=

'总和为'

+

IntToStr<sum>;end;

end.

第八章8.8编写函数,输出100~500之间所有能同时被3和13整除的数。unit

Unit1;

interface

uses

Windows,

Messages,

SysUtils,

Variants,

Classes,

Graphics,

Controls,

Forms,

Dialogs,

StdCtrls;

type

TForm1

=

class<TForm>

Label1:

TLabel;

procedure

FormCreate<Sender:

TObject>;

private

{

Private

declarations

}

Function

checkNum<num:integer>:boolean;

public

{

Public

declarations

}

end;

var

Form1:

TForm1;

implementation

{$R

*.dfm}

Function

TForm1.checkNum<num:integer>:boolean;

var

n

:boolean;

begin

if

<num

mod

3

=

0>

And

<num

mod

13

=

0>

then

n

:=

true

else

n

:=

false;

result

:=

n;

end;

procedure

TForm1.FormCreate<Sender:

TObject>;

var

i

:

integer;

var

out

:

string;

begin

for

i

:=

100

to

500

do

begin

if

checkNum<i>

then

out

:=

out

+

'

'

+

IntToStr<i>;

end;

form1.Label1.Caption

:=

out;

end;

end.

第九章9.2打开对话框组件和打开图片对话