int n =4;object obj = n;//装箱
Console.WriteLine("n的初始值为:{0},装箱后值为:{1}", n , obj.ToString());
拆箱
int n =4;object obj = n;//装箱
Console.WriteLine("n的初始值为:{0},装箱后值为:{1}", n , obj.ToString());int m =(int)obj;//拆箱
Console.WriteLine("引用类型的值为:{0},拆箱后的值为:{1}", obj.ToString(), m );
2019独角兽企业重金招聘Python工程师标准>>> 修改字符集 查看字符集 show variables like character%
show variables like %char% 上面的两个命令都可以,我一般使用的下面的,会出来如下几个字符集设定的选项: character_set_clie…
同码率下的图像质量或同图像质量下的码率。
AVCodecContext
/** * the average bitrate * - encoding: Set by user; unused for constant quantizer encoding. * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the strea…