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Defines whether Checked Iterators are enabled. If defined as 1, unsafe iterator use causes a runtime error and the program is terminated. If defined as 0, checked iterators are disabled. In debug mode, the default value for _SECURE_SCL is 1, meaning checked iterators are enabled. In release mode, the default value for _SECURE_SCL is 0.
Important
Use _ITERATOR_DEBUG_LEVEL to control _SECURE_SCL. For more information, see _ITERATOR_DEBUG_LEVEL.
Remarks
To enable checked iterators, set _SECURE_SCL to 1:
#define _SECURE_SCL 1
To disable checked iterators, set _SECURE_SCL to 0:
#define _SECURE_SCL 0
For information on how to disable warnings about checked iterators, see _SCL_SECURE_NO_WARNINGS.