delphi 编程报错？什么意思？

[Error] Unit1.pas(53): Constant expression expected
[Error] Unit1.pas(59): Statement expected but 'PROCEDURE' found
[Error] Unit1.pas(59): Undeclared identifier: 'EditKeyPress'
[Error] Unit1.pas(59): ';' expected but '(' found
[Error] Unit1.pas(59): ';' expected but ')' found
[Error] Unit1.pas(66): Statement expected but 'PROCEDURE' found
[Error] Unit1.pas(71): Undeclared identifier: 'Edit1Enter'
[Error] Unit1.pas(73): Undeclared identifier: 'checkbox1'
[Error] Unit1.pas(80): Undeclared identifier: 'edit1'
[Error] Unit1.pas(83): Missing operator or semicolon
[Error] Unit1.pas(86): Undeclared identifier: 'x'
[Error] Unit1.pas(86): ')' expected but identifier 'Text' found
[Error] Unit1.pas(87): Missing operator or semicolon
[Warning] Unit1.pas(87): Comparing signed and unsigned types - widened both operands
[Error] Unit1.pas(90): Missing operator or semicolon
[Error] Unit1.pas(96): Statement expected but 'PROCEDURE' found
[Error] Unit1.pas(96): Undeclared identifier: 'Edit2Enter'
[Error] Unit1.pas(98): Undeclared identifier: 'checkbox1'
[Error] Unit1.pas(105): Undeclared identifier: 'edit2'
[Error] Unit1.pas(108): Missing operator or semicolon
[Error] Unit1.pas(111): Undeclared identifier: 'x'
[Error] Unit1.pas(111): ')' expected but identifier 'Text' found
[Error] Unit1.pas(112): Missing operator or semicolon
[Warning] Unit1.pas(112): Comparing signed and unsigned types - widened both operands
[Error] Unit1.pas(115): Missing operator or semicolon
[Error] Unit1.pas(118): Statement expected but 'PROCEDURE' found
[Error] Unit1.pas(119): Identifier redeclared: 'TForm1.Button2Click'
[Error] Unit1.pas(26): Unsatisfied forward or external declaration: 'TForm1.Edit1Change'
[Error] Unit1.pas(27): Unsatisfied forward or external declaration: 'TForm1.Edit2Change'
[Fatal Error] Project1.dpr(5): Could not compile used unit 'Unit1.pas'