Type environmental variable that doesn't exist

[batchcc]

I have the following batch code

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@echo off
cls
echo enter first word
set /p a=
echo enter second word
set /p b=
@echo off
@echo if %word% == %a% echo to %b% ----- %c%>> c.txt
@echo if %word% == %b% echo to %a% ----- %c%>> c.txt
goto top

unfortunately the environmental variables %word% and %c% don't get typed because they don't exist in this file how can I type them into the text file?
this is what gets written to the file

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if  == hello echo to bye ----- 
if  == bye echo to hello ----- 

[penpen]

I'm not sure if this is what you want to do:

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echo if %%word%% == %a% echo to %b% ----- %%c%%>> c.txt
echo if %%word%% == %b% echo to %a% ----- %%c%%>> c.txt

penpen