C + + for security versions of functions such as strcpy

The following programs:

#include <iostream>usingnamespace  std; int Main () {     char ch1[];    strcpy (CH1,"123456");}

Error when compiling on VS2012:

Error C4996: ' strcpy ': This function or variable could be unsafe. Consider using strcpy_s instead.

In VS2010, there are numerous system function names appended with _s, such as scanf_s (), strcmp_s (), and so on. _s that this method is safe (safe), the original function on the length of the string is ignored, may overflow, these add _s method to determine the length, if the target character can not be copied.

That's why the _s security version appears.

C + + for security versions of functions such as strcpy