VS2013讀取.txt文件fopen報錯C4996

編寫C++程序臺應用程序時需要讀取.txt文件，調用fopen後出現錯誤「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

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