From 015e6c8bd528ac326e897631afa9820d672a35b3 Mon Sep 17 00:00:00 2001
From: Ivan Mahonin <bh@icystar.com>
Date: Jan 18 2019 17:58:00 +0000
Subject: lazarus: calc-line


---

diff --git a/lazarus/calc-line/project1.ico b/lazarus/calc-line/project1.ico
new file mode 100644
index 0000000..0341321
Binary files /dev/null and b/lazarus/calc-line/project1.ico differ
diff --git a/lazarus/calc-line/project1.lpi b/lazarus/calc-line/project1.lpi
new file mode 100644
index 0000000..3afe492
--- /dev/null
+++ b/lazarus/calc-line/project1.lpi
@@ -0,0 +1,79 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<CONFIG>
+  <ProjectOptions>
+    <Version Value="9"/>
+    <General>
+      <SessionStorage Value="InProjectDir"/>
+      <MainUnit Value="0"/>
+      <Title Value="project1"/>
+      <ResourceType Value="res"/>
+      <UseXPManifest Value="True"/>
+      <Icon Value="0"/>
+    </General>
+    <i18n>
+      <EnableI18N LFM="False"/>
+    </i18n>
+    <VersionInfo>
+      <StringTable ProductVersion=""/>
+    </VersionInfo>
+    <BuildModes Count="1">
+      <Item1 Name="Default" Default="True"/>
+    </BuildModes>
+    <PublishOptions>
+      <Version Value="2"/>
+    </PublishOptions>
+    <RunParams>
+      <local>
+        <FormatVersion Value="1"/>
+      </local>
+    </RunParams>
+    <RequiredPackages Count="1">
+      <Item1>
+        <PackageName Value="LCL"/>
+      </Item1>
+    </RequiredPackages>
+    <Units Count="2">
+      <Unit0>
+        <Filename Value="project1.lpr"/>
+        <IsPartOfProject Value="True"/>
+      </Unit0>
+      <Unit1>
+        <Filename Value="unit1.pas"/>
+        <IsPartOfProject Value="True"/>
+        <ComponentName Value="Form1"/>
+        <ResourceBaseClass Value="Form"/>
+        <UnitName Value="Unit1"/>
+      </Unit1>
+    </Units>
+  </ProjectOptions>
+  <CompilerOptions>
+    <Version Value="11"/>
+    <Target>
+      <Filename Value="project1"/>
+    </Target>
+    <SearchPaths>
+      <IncludeFiles Value="$(ProjOutDir)"/>
+      <UnitOutputDirectory Value="lib/$(TargetCPU)-$(TargetOS)"/>
+    </SearchPaths>
+    <Linking>
+      <Options>
+        <Win32>
+          <GraphicApplication Value="True"/>
+        </Win32>
+      </Options>
+    </Linking>
+  </CompilerOptions>
+  <Debugging>
+    <Exceptions Count="3">
+      <Item1>
+        <Name Value="EAbort"/>
+      </Item1>
+      <Item2>
+        <Name Value="ECodetoolError"/>
+      </Item2>
+      <Item3>
+        <Name Value="EFOpenError"/>
+      </Item3>
+    </Exceptions>
+  </Debugging>
+</CONFIG>
diff --git a/lazarus/calc-line/project1.lpr b/lazarus/calc-line/project1.lpr
new file mode 100644
index 0000000..58c35dc
--- /dev/null
+++ b/lazarus/calc-line/project1.lpr
@@ -0,0 +1,21 @@
+program project1;
+
+{$mode objfpc}{$H+}
+
+uses
+  {$IFDEF UNIX}{$IFDEF UseCThreads}
+  cthreads,
+  {$ENDIF}{$ENDIF}
+  Interfaces, // this includes the LCL widgetset
+  Forms, Unit1
+  { you can add units after this };
+
+{$R *.res}
+
+begin
+  RequireDerivedFormResource:=True;
+  Application.Initialize;
+  Application.CreateForm(TForm1, Form1);
+  Application.Run;
+end.
+
diff --git a/lazarus/calc-line/project1.res b/lazarus/calc-line/project1.res
new file mode 100644
index 0000000..e994dfa
Binary files /dev/null and b/lazarus/calc-line/project1.res differ
diff --git a/lazarus/calc-line/unit1.lfm b/lazarus/calc-line/unit1.lfm
new file mode 100644
index 0000000..49e242c
--- /dev/null
+++ b/lazarus/calc-line/unit1.lfm
@@ -0,0 +1,26 @@
+object Form1: TForm1
+  Left = 315
+  Height = 105
+  Top = 260
+  Width = 408
+  Caption = 'Form1'
+  ClientHeight = 105
+  ClientWidth = 408
+  LCLVersion = '1.6.2.0'
+  object Edit1: TEdit
+    Left = 16
+    Height = 38
+    Top = 48
+    Width = 368
+    OnChange = Edit1Change
+    TabOrder = 0
+  end
+  object Label1: TLabel
+    Left = 16
+    Height = 21
+    Top = 16
+    Width = 227
+    Caption = 'Enter simple expression like: 2+3='
+    ParentColor = False
+  end
+end
diff --git a/lazarus/calc-line/unit1.pas b/lazarus/calc-line/unit1.pas
new file mode 100644
index 0000000..c09bc8f
--- /dev/null
+++ b/lazarus/calc-line/unit1.pas
@@ -0,0 +1,73 @@
+unit Unit1;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, StdCtrls;
+
+type
+
+  { TForm1 }
+
+  TForm1 = class(TForm)
+    Edit1: TEdit;
+    Label1: TLabel;
+    procedure Edit1Change(Sender: TObject);
+  private
+    { private declarations }
+  public
+    { public declarations }
+  end;
+
+var
+  Form1: TForm1;
+
+implementation
+
+{$R *.lfm}
+
+{ TForm1 }
+
+procedure TForm1.Edit1Change(Sender: TObject);
+var
+  i: integer;
+  a, b: single;
+  c, sign: char;
+  digits: string;
+  line: string;
+  result: string;
+begin
+  digits := '';
+  sign := ' ';
+  a := 0;
+  b := 0;
+  line := Edit1.Text;
+
+  try
+    for i := 1 to length(line) do begin
+      c := line[i];
+      if (c='+') or (c='-') or (c='*') or (c='/') then begin
+        a := StrToFloat(digits);
+        digits := '';
+        sign := c;
+      end else
+      if c = '=' then begin
+        b := StrToFloat(digits);
+        digits := '';
+        result := '';
+        if sign='+' then result := FloatToStr(a + b);
+        if sign='-' then result := FloatToStr(a - b);
+        if sign='*' then result := FloatToStr(a * b);
+        if sign='/' then result := FloatToStr(a / b);
+        Edit1.Text := copy(line, 1, i) + result;
+      end else begin
+        digits := digits + c;
+      end;
+    end;
+  except end;
+end;
+
+end.
+