Two ways to set # define _crt_secure_no_warnings in VS

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

2. We have two solutions at this time:

A. Defined 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---config properties-----preprocessor-----edit

Add one line to the bottom: _crt_secure_no_warnings (Note that no # define is required)

As shown in the following:

Two ways to set # define _crt_secure_no_warnings in VS