Error: To disable deprecation, use _CRT_SECURE_NO_WARNINGS. Error 1 error C4996: 'sscanf': This function or variable may be unsafe. Consider using sscanf_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. Error 1 error C4996: 'fopen': This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. Solution: Go to Project -> Properties -> C/C++ -> Preprocessor -> Preprocessor Definitions and add _CRT_SECURE_NO_WARNINGS in the list. This Visual C++ warning, C4996, flags standard C functions such as sscanf and fopen as unsafe because they do not bound their buffers, and MSVC suggests the _s secure variants instead. You can switch to the suggested secure functions, or define _CRT_SECURE_NO_WARNINGS to silence the warning once you have rev...