Introduction - If you have any usage issues, please Google them yourself
Delphi: Delphi to achieve in the program with a custom file input format, MyDateFile.Dat data is stored, the program supports data formats judgment, an error will be prompted to "fill in the date or price error", each corresponding to a different format input boxes are, of course, data to determine the code is not the same, you can view the corresponding code according to their needs.