Why Does Visual Studio 2013 Error on C4996

Why does Visual Studio 2013 issue a C4996 error?

Apparently new projects enable "SDK check" by default now, which treats these warnings as errors. To disable it, go to project properties -> Configuration Properties -> C/C++ -> General -> SDL checks -> No.

error C4996: 'scanf': This function or variable may be unsafe in c programming

It sounds like it's just a compiler warning.

Usage of scanf_s prevents possible buffer overflow.

See: http://code.wikia.com/wiki/Scanf_s

Good explanation as to why scanf can be dangerous: Disadvantages of scanf

So as suggested, you can try replacing scanf with scanf_s or disable the compiler warning.

error C4996: visual studio: why do I get an error when I use fopen in c?

You need to place a definition of #define _CRT_SECURE_NO_DEPRECATE before your include. Like,

#define _CRT_SECURE_NO_DEPRECATE
#include <stdio.h>

Error C4996 received when compiling sqlite.c in Visual Studio 2013

This is because SDL check, try to disable SDL checks:

Project Properties > Configuration Properties > C/C++ > General > SDL checks [set to No]

Suppressing warning C4996: why not working?

Solved thanks to WhozCraig

Solution: The warning suppression needs to be placed before any includes, as some of them apparently include eigen too.

How to use _CRT_SECURE_NO_WARNINGS

Add by

Configuration Properties>>C/C++>>Preporocessor>>Preprocessor
Definitions>> _CRT_SECURE_NO_WARNINGS

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