How to printf "unsigned long" in C?

[patriciabrown]

I can never understand how to print unsigned long datatype in C.
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Suppose unsigned_foo is an unsigned long, then I try:

printf("%lu\n", unsigned_foo)
printf("%du\n", unsigned_foo)
printf("%ud\n", unsigned_foo)
printf("%ll\n", unsigned_foo)
printf("%ld\n", unsigned_foo)
printf("%dl\n", unsigned_foo)
And all of them print some kind of -123123123 number instead of unsigned long that I have.

 

[Rogers34]

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