次のプログラムをFor.. Nextを使って書き換えなさい。
Sub Triangle01()
Dim angle, length
angle = 120
length = 100
InitializeTurtleGraphics
TGMoveL length
TGTurn angle
TGMoveL length
TGTurn angle
TGMoveL length
End Sub
Sub Triangle02() ' 三角形を描く
Dim angle, length
Dim i
angle = 120
length = 100
InitializeTurtleGraphics
For i = 1 To 3
TGMoveL length
TGTurn angle
Next i
End Sub