Add linked_list.c

[Gonglja]

If this PR is related to coding or code translation, please fill out the checklist.

• I've tested the code and ensured the outputs are the same as the outputs of reference codes.
• I've checked the codes (formatting, comments, indentation, file header, etc) carefully.
• The code does not rely on a particular environment or IDE and can be executed on a standard system (Win, macOS, Ubuntu).

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1 Ignored Deployment

Name	Status	Preview	Updated
hello-algo	⬜️ Ignored (Inspect)		Jan 13, 2023 at 8:19AM (UTC)

[Gonglja]

I will close this PR first, and re-initiate later, this PR should not contain the latest master code

thanks，please watch this

[Reanon]

I will close this PR first, and re-initiate later, this PR should not contain the latest master code

thanks，please watch this
You can rebase to the lasted codes of master branch, modify your code, and then push a new commit. No need to close PR.

[Gonglja]

I will close this PR first, and re-initiate later, this PR should not contain the latest master code
thanks，please watch this
You can rebase to the lasted codes of master branch, modify your code, and then push a new commit. No need to close PR.

Thanks, it has been returned to the last submission

[krahets]

Thanks! Please revert the changes size_t back to int. This book is for freshers so simplicity is vital. We should ignore unimportant programming specifications.

[Gonglja]

Thanks! Please revert the changes size_t back to int. This book is for freshers so simplicity is vital. We should ignore unimportant programming specifications.

Ok, but it should be noted that if the reader turns on the strict mode of the compiler, the file cannot be compiled