93技藝競賽Q3-聯立方程式
Solomon
posted @ 2010年9月13日 09:08
in Uncategorized
, 1484 阅读
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim fileContents As String
fileContents = My.Computer.FileSystem.ReadAllText(Application.StartupPath & "\Test3.txt")
Dim d() = Split(fileContents, ",")
Dim a1 = Val(d(0)), b1 = Val(d(1)), c1 = Val(d(2)), a2 = Val(d(3)), b2 = Val(d(4)), c2 = Val(d(5))
'a1*X + b1*Y + c1 = 0
'a2*X + b2*Y + c2 = 0
Dim n = a2 / a1
a1 = a1 * n
b1 = b1 * n
c1 = c1 * n
a1 = a1 - a2
b1 = b1 - b2
c1 = c1 - c2
Dim k = -1 * c1
Dim y = k / b1
b2 = b2 * y
n = (b2 + c2) * -1
Dim x = n / a2
Dim STR1 = "X = " & x & ", Y = " & y
My.Computer.FileSystem.WriteAllText(Application.StartupPath & "\result3.txt", STR1, False)
End
End Sub
End Class
解得出數學題，成就感是不同的 !
誰叫我國中數學就開始學不好，
XX老師的問題??
學習筆記一下：
正負反轉的方式很多
例:
a1 = 3 a1 = a1 * -1 '將a1 = 3乘上 -1 就等於 -3 a1 = -3 a1 = 0 - a1 '用 0 減去 a1 = -3 就等於 3
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