[case solved] Warnings in C code with using strdup()

Question

https://code.sololearn.com/cUBwKhWJ5BAr/?ref=app

I get some warnings in the attached code and I have no clue how to get rid of them. Despite that the desired output seems correct.

Can I get a hint in order to remove the warnings.

Answer 1

Maybe

extern char* strdup(const char*);

as suggested here:
https://stackoverflow.com/questions/26284110/strdup-confused-about-warnings-implicit-declaration-makes-pointer-with#26284172

From skimming the thread, it looks like the function is not part of the standard and depending on how strict the compiler is, we get a warning.

Answer 2

Thank you Lisa for the hint.

By using

extern char* strdup(const char*);

right after the #include directives, as in your mentioned stackoverflow thread suggested, the code runs without warnings.

🙂👍