. 4.3-9.
| Option Strict On Option Explicit On Imports System.Math Public Class Form1 ' TextBox Function vvod(ByVal T As TextBox) As Single Return CSng(Val(T.Text)) End Function ' TextBox Sub vivod(ByVal Z As Single, ByVal T As TextBox) T.Text = CStr(Z) End Sub ' Public Function (ByVal x1 As Single, _ ByVal y1 As Single, ByVal x2 As Single, _ ByVal y2 As Single) As Single Return CSng(Sqrt((x2 - x1) ^ 2 + (y2 - y1) ^ 2)) End Function ' Sub PS(ByVal x1 As Single, ByVal y1 As Single, _ ByVal x2 As Single, ByVal y2 As Single, _ ByVal x3 As Single, ByVal y3 As Single, _ ByRef P As Single, ByRef S As Single) Dim A, B, C, Pp As Single A = (x1, y1, x2, y2)' - - .. B = (x2, y2, x3, y3) C = (x3, y3, x1, y1) P = (A + B + C): Pp = P / 2 S = CSng(Sqrt(Pp * (Pp - A) * (Pp - B) * (Pp - C))) End Sub ' Button1 Private Sub Button1_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles Button1.Click Dim x1 As Single, x2 As Single, x3 As Single Dim y1 As Single, y2 As Single, y3 As Single Dim As Single, As Single x1 = vvod(TextBox1): x2 = vvod(TextBox2): x3 = vvod(TextBox3) y1 = vvod(TextBox6): y2 = vvod(TextBox7): y3 = vvod(TextBox8) PS(x1, y1, x2, y2, x3, y3, , ) vivod(, TextBox4): vivod(, TextBox5) End Sub Private Sub Button2_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles Button2.Click End End Sub End Class |
. 4.3-9
. 4.3-10.
. 
. 4.3-10
A = 
= 2.82843 B = 
= 
2
C = 
= 2 = + + = 6.828427; = /2 = 3.414213 S= 
= 2
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