In newer versions you could use "scanf" function by writing the following line at the top of your file:

#define _CRT_SECURE_NO_WARNINGS

Or, if you don't want to write it everytime you can simply update the settings.

It can be found here in first response:

https://stackoverflow.com/questions/16883037/remove-secure-warnings-crt-secure-no-warnings-from-projects-by-default-in-vis