NAME

tron - turn on execution tracing
troff - turn off execution tracing

SYNOPSIS

tron .  .  . 
troff

DESCRIPTION

Tron and troff are debugging aids.  Tron turns on tracing and troff turns it off.  When tracing is on, each program line number is printed within square brackets as it is executed.  Unnumbered lines are displayed as having line number 0. 

EXAMPLE

The program

	10 tron
	20 i = 11
	30 for j = 1 to 2
	40	k = i + 10
	50	print i; j; k
	60	i = i + 10
	70 next
	80 troff
	90 end

produces the output

	[10][20][30][40] 11 1 21
	[50][60][30][40] 21 2 31
	[50][60][70]

This example uses tron to trace execution of a loop.  The numbers in brackets are line numbers which constitute the trace.  All other output is produced by the print statement in the program. 

USAGE NOTES

If the program is compiled with the "-L" option, tron and troff may not be used.  The "-L" option is used to decrease the size of the compiled Basmark QuickBASIC program by omitting information about program line numbers at run-time. 

from The Basmark QuickBASIC Programmer’s Manual by Lawrence Leinweber