The program differentiated between data for the spreadsheet and a command for the menu by detecting the presence of a backslash character (\). If a user typed a slash, the keystrokes that followed were interpreted as menu commands rather than data.
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- 程序通过检查是否有斜线符号(\\)来区分电子表格数据和菜单命令,如果用户输入一个斜线符号,其后的击键将看做菜单命令,而不是数据。