What are the go-to tools for finding errors in C code? [closed]

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It might be either static or dynamic analysis, preferably free.

Answer 1

• cppcheck checks both C and C++ code and finds many errors.

• Valgrind is a tool for runtime analysis, but I mention it anyway. It is extremely useful for tracking memory errors like uninitialized usage or leaks.

• Also, activate ALL warnings your compiler has (GCC and clang: -Wall -Wpedantic -Wextra), which often reveals useful info.

• Note: clang sometimes generates much better warnings/errors than GCC

• To find logic errors, however, testing is required. Testing is required anyway, something that is not tested is per definition broken, as you cannot assume it works.
  Wikipedia has a list of C unit testing software.