麻烦帮忙解释一下这几个语句的意思

hfut_wangfei

wchr = 0;
给变量wchr赋值为0
wchr = (chr[0] & 0xff) << 8;
把chr[0]与0xff进行二进制与运算，然后按位向左移位8位，最后赋值给wchr
wchr |= (chr[1] & 0xff);
将(chr[1] & 0xff)与wchr进行二进制或运算，将运算结果再赋值给wchr