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TRON是BASIC语言中的一条调试指令，其为TRace ON的缩写，主要用于调试带行号BASIC的GOTO和语句。在文本模式环境中，例如，MS-DOS/IBM PC-DOS，执行这条指令允许程序在屏幕上显示当前执行指令的行号。在窗口环境中，若执行了TRON指令，则会出现一个显示当前指令行号的窗口。其对应指令为TROFF，为TRace OFF的缩写，用于关闭命令追踪。
, TRON is a debugging command in old dialect … TRON is a debugging command in old dialects of the BASIC programming language. It is an abbreviation of TRace ON. It was used primarily for debugging line-numbered BASIC GOTO and GOSUB statements. In text-mode environments such as the TRS-80 or DOS, it would print the current line number which was being executed, on-screen. In a windowed environment, when the TRON command had been executed, a window would indicate the line number being executed at that instant. This command's opposite is TROFF, or TRace OFF, used to turn off command tracing. TRON and TROFF were made obsolete by the advent of multitasking windowing environments, which permit a developer to switch back and forth between program output and source code. Modern IDEs take advantage of this to allow far more sophisticated debugging (line-by-line step-through execution of source code, examination/modification of variables, etc.). As a result, TRON/TROFF are no longer supported by most current BASIC dialects, including Microsoft Visual Basic.ialects, including Microsoft Visual Basic.
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| rdfs:comment |
TRON是BASIC语言中的一条调试指令，其为TRace ON的缩写，主要用于调试带行号BASIC的GOTO和语句。在文本模式环境中，例如，MS-DOS/IBM PC-DOS，执行这条指令允许程序在屏幕上显示当前执行指令的行号。在窗口环境中，若执行了TRON指令，则会出现一个显示当前指令行号的窗口。其对应指令为TROFF，为TRace OFF的缩写，用于关闭命令追踪。
, TRON is a debugging command in old dialect … TRON is a debugging command in old dialects of the BASIC programming language. It is an abbreviation of TRace ON. It was used primarily for debugging line-numbered BASIC GOTO and GOSUB statements. In text-mode environments such as the TRS-80 or DOS, it would print the current line number which was being executed, on-screen. In a windowed environment, when the TRON command had been executed, a window would indicate the line number being executed at that instant. This command's opposite is TROFF, or TRace OFF, used to turn off command tracing.ace OFF, used to turn off command tracing.
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| rdfs:label |
TRON指令
, TRON command
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