Regarding the C code, just what warnings would you advise a user to ignore? Most warnings are indicative of an error on the part of the coder, even it it happens, from time to time, to not be fatal. Would you be referring to warnings regarding your use of 'malloc', because you forgot to #include stdlib.h or malloc.h?
Further, you have a serious error that the compiler won't flag. You don't test the return from malloc to see if it's NULL. The system is perfectly within its rights to refuse to allocate the memory and return a NULL indicating that. Trying to dereference that NULL will send your program off into the weeds to barf on its shoes.
Given all that, and the use of non-portable things like conio.h (whose functions actually add virtually nothing to your program), this is not a robust example of a linked-list implementation.