Welcome to Darwin!
[calvin:~] peter% cd Desktop/cs6450/
[calvin:~/Desktop/cs6450] peter% gdb --annotate=3 ./main
GNU gdb 5.0-20001113 (Apple version gdb-203) (Wed Nov  7 16:28:57 GMT 2001) (UI_OUT)
Copyright 2000 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "powerpc-apple-macos10".
Reading symbols for shared libraries .. done

breakpoints-invalid
(gdb) break 35

post-prompt

breakpoints-invalid
Breakpoint 1 at 0x5904: file main.c, line 35.
(gdb) run

post-prompt
Starting program: /Users/peter/Desktop/cs6450/./main 
[Switching to thread 1 (process 21495 thread 0x1603)]

breakpoints-invalid

breakpoints-invalid

starting

breakpoints-invalid

breakpoint 1

Breakpoint 1, 
frame-begin 0 0x5904

frame-function-name
main
frame-args
 ()
frame-source-begin
 at 
frame-source-file
main.c
frame-source-file-end
:
frame-source-line
35
frame-source-end


source /Users/peter/Desktop/cs6450/main.c:35:1190:beg:0x5904

frame-end

stopped
(gdb) next

post-prompt

starting

frames-invalid

breakpoints-invalid
LPP Database System V2.0

frames-invalid

breakpoints-invalid

source /Users/peter/Desktop/cs6450/main.c:36:1232:beg:0x5910

frame-end

stopped
(gdb) display tree

post-prompt

display-begin
1
display-number-end
: 
display-format

display-expression
tree
display-expression-end
 = 
display-expression
(Tree *) 0x0

display-end
(gdb) quit

post-prompt

pre-query
The program is running.  Exit anyway? (y or n) 
query
y

post-query

frames-invalid
[calvin:~/Desktop/cs6450] peter%