How to Eliminate Secure Warnings (_CRT_SECURE_NO_WARNINGS) in Visual Studio Projects by Default?

Remove Secure Warnings (_CRT_SECURE_NO_WARNINGS) from Projects by Default in Visual Studio

To avoid repeatedly removing secure warnings when using functions like scanf(), Visual Studio provides a default setting for all projects. Rather than manually adding #define _CRT_SECURE_NO_WARNINGS or editing project options, follow these steps:

1. Select Multiple Projects: Mark all the desired projects in Solution Explorer.
2. Open Properties Window: Press Alt-F7 or right-click on the project and select "Properties."

3. Configure Preprocessor Definitions:

   • Under "Configuration" select "All Configurations."
   • Click on the "Preprocessor Definitions" line to open its editor.
   • Choose "Edit."
   • Copy "_CRT_SECURE_NO_WARNINGS" into the white box labeled "Preprocessor Definitions" at the top.
4. Save Changes: Click "OK" to apply the changes and remove the warnings for all selected projects by default.

This solution ensures that all future projects will automatically suppress the secure warnings, making it more convenient and time-saving for programming contests and other coding tasks.

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