Two ways to set up #define _crt_secure_no_warnings in VS

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Two ways to set up #define _crt_secure_no_warnings in VS

1. We compile old C-language open source projects such as the LUA source package, perhaps because some old. c files using strcpy,scanf, and other unsafe functions, and reported warnings and errors, resulting in the inability to compile through.

2. At this point we have two kinds of solutions:

A. Definition at the beginning of the specified source file: #define _crt_secure_no_warnings (only works in this file)

B. Set in the project properties, which will take effect throughout the project, select: Properties-> Configuration Properties->c/c++-> preprocessor-> preprocessor Definition-> Edit

Add one line below: _crt_secure_no_warnings (note that you do not need #define)

As shown in the following illustration: