warning C4996: 'ctime': This function or variable may be unsafe. Consider using ctime_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\time.h(475): note: 'ctime' の宣言を確認してください