error trapの例文

• Menus, buttons, on-screen instructions, help screens, pop-up hints, and built-in error traps are also provided.
• In fact, the spreadsheet can be made invisible except for a transparent user interface that requests pertinent input from the user, displays results requested by the user, creates reports, and has built-in error traps to prompt correct input.
• The ON ERROR SYSTEM; statement allows a nested error trap; if an error occurs within an ON-unit, control might pass to the operating system where a system dump might be produced, or, for some computational conditions, continue execution ( as mentioned above ).