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The first and second command in an && chain aren't parent/child as much as siblings. The parent controlling them gets the value, and can tell whether to launch the next one.

This is the second homework violation for part of the same homework project. As you have been told in private mail twice, homework must be filed in the Homework and Coursework Questions forum and...

Try echo "echo \"${tmp}\" >> $i" >> bundle.sh.

EDIT: But if a line in bin.sh has double-quotes in it you're still going to have a problem. You could transform the line first to escape any...

mkdir -p home/student will create home (if it doesn't already exist) and home/student under the current directory (note the lack of leading slash - otherwise you're specifying an absolute path).

For me it works fine :
$ echo "#include<stdio.h>" >> myls.c
$ cat myls.c
#include<stdio.h>
$
On which OS are you running?
Please provide a full example that demonstrate the issue

How about this ?
$ cat test123
foo
bar
baz
goo
foo baar
$ cat p33.sh
#!/bin/sh

i=test123
number=`wc -l < $i`
count=1
while [ $count -le $number ]
do
tmp=`sed -n "$count,1p" $i`
...

Instead of generating a file that regenerate the file, why don't you just generate a copy of the file ?

If you want to copy a directory with subtree, see
tar command as well as cp or scp command...