Compile "hello.c" into an executable program called "hello":

    gcc -g -Wall -o hello hello.c

Debug "hello" with "gdb":

   gdb hello

Try the follow gdb commands:

    run
    run a bb ccc
    run
    break main
    run
    where
    list
    print argc
    set argc=2
    p argc
    p argv[0]
    p argv[1]
    next
    n
    cont
    quit

Compile "crash.c" into an executable program called "crash":

    gcc -g -Wall -o crash crash.c

Debug "crash" with "gdb":

   gdb crash

Try the follow gdb commands:

    run a bb ccc
    where
    print j
    quit

Create a transcript and run crash under valgrind

    script
    valgrind ./crash
    exit
    more typescript