c语言中.用4种颜色画8个球,要求每个球的颜色随机选择的程序怎么写

4种颜色 的RGB 数值存放在 unsigned int color[4] 里。

用 rand()%4 定出 color[ ] 的下标 ( 0,1,2,3 之一）

#include <stdioh>

#include <timeh>

main(){

unsigned int color[4]={0xff00a0,0x00ff80,0x8040ff,0xff8000};

int i;

srand(time(NULL)); // 随机种子

for (i=0;i<8;i++)

{

printf("draw Ball_%d in color %06x\n",i,color[rand()%4]);

}

return 0;

}

cls

dim a$(1 to 9)

randomize timer ’重置随机数种子

for i=1 to 9

read a$(i) '输入那些水果

next i

x=int(rnd9+1)

do

y=int(rnd9+1)

loop while y=x

do

z=int(rnd9+1)

loop while z=x or z=y

'这两个do循环是为了不重复选择

print a$(x);a$(y);a$(z) '打印水果

data 苹果,橘子,桃,梨,葡萄,西瓜,椰子,杏,香蕉

end

关于放到网页里，我就不知道了，你得琢磨琢磨。

建立两个Command1和2

Dim RedBalls, BullBalls

Private Sub Command1_Click()

'Label1Caption = ""

rarr = GetRndNotRepeat(0, UBound(RedBalls), 6)

barr = GetRndNotRepeat(0, UBound(BullBalls), 1)

For i = 1 To 6

t = Now

Do

DoEvents

Loop While DateDiff("s", t, Now) < 15

FillStyle = 0

FillColor = vbRed

Form1Circle (500 + i 500, 1000), 200, vbRed

CurrentX = 350 + i 500

CurrentY = 840

Print Format(RedBalls(rarr(i)), "00")

Next i

t = Now

Do

DoEvents

Loop While DateDiff("s", t, Now) < 2

i = 7

FillStyle = 0

FillColor = vbBlue

Form1Circle (500 + i 500, 1000), 200, vbBlue

CurrentX = 350 + i 500

CurrentY = 840

Print Format(BullBalls(barr(1)), "00")

End Sub

Private Sub Command2_Click()

End

End Sub

Private Sub Form_Load()

RedBalls = Array(2, 3, 4, 7, 8, 9, 12, 13, 14, 17, 18, 19, 22, 23, 24, 27, 28, 29, 32, 33)

BullBalls = Array(3, 4, 5, 9, 13, 14, 15)

'Label1Caption = ""

Command1Caption = "开始"

Command2Caption = "退出"

Form1FontSize = 15

Form1FontName = "Arial"

Form1ForeColor = &HFFFFFF

End Sub

Public Function GetRndNotRepeat(ByVal NumMin As Integer, ByVal NumMax As Integer, ByVal n As Integer)

Dim arr() As Integer

If n > NumMax - NumMin + 1 Then

ReDim arr(0)

arr(0) = 0

Else

ReDim arr(n)

Dim b() As Byte

Dim m As Integer

m = Int((NumMax - NumMin) / 8)

ReDim b(m)

Dim x As Integer, y As Integer

Dim z As Byte

Randomize

arr(0) = 1

For i = 1 To n

Do

x = Int(Rnd (NumMax - NumMin + 1)) + NumMin

y = x - NumMin

z = 2 ^ (y Mod 8)

y = y \ 8

Loop While b(y) And z

b(y) = b(y) Or z

arr(i) = x

Next i

End If

GetRndNotRepeat = arr

End Function

已经运行过。

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