Unit testing in C is a way to test the smallest pieces of your code, usually individual functions, to make sure they work exactly as expected. You give a function a specific input, check the output, and see if it matches your guess.
Because C is a low-level language, it does not have a built-in test runner. You have to use external tools or write your own tests from scratch. Popular Testing Frameworks
Instead of building your own test setup, you can use these popular tools: Unit Testing C Code [closed] – Stack Overflow
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