My book says the get_s() function is a better alternative to the gets() function, which is deprecated and should not be used. But, when I try to use the get_s() function it always gives me an error:
undefined reference to gets_s
This page says something about the gets_s, function that I didn't really understand about it being defined in the ISO/IEC 99. Shouldn' t it work with all the compilers? I'm pretty sure I'm using a very recent version of the MinGW compiler.
How should I use this function? Is using the gets() or scanf() (instead of scanf_s()), or fgets() over fgets_s(), not good?
yes you are right #bumblebee The gets() function does not perform bounds checking, therefore this function is extremely vulnerable to buffer-overflow attacks. It cannot be used safely (unless the program runs in an environment which restricts what can appear on stdin). For this reason, the function has been deprecated in the third corrigendum to the C99 standard and removed altogether in the C11 standard. fgets() and gets_s() are the recommended replacements. Never use gets().
source: http://en.cppreference.com/w/c/io/gets check weather you included the corresponding header. and one more thing u have to see is that weather you c comiler version is an updated version or the old version that can also create a problem.. so try in a c11 standard ,or a c11 online compiler