シフト演算 - お勉強メモ

short		byte	byte

int型にshortとbyte、byteをつめこみたい
→シフト演算
１)頭がshort型のとき

---

int ret=0;
short year = (short)5;
byte month = (byte)9;
byte date = (byte)15;

ret = year <<(8*3);//3byte * 8bit
ret += month<<8;//1byte * 8bit
ret +=date;

ret=83888399
→101/00001001/00001111(2進)

(2進)

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真ん中がshort

byte	short		byte

byte year2=(byte)5;
short month2=(short)9;
byte date2=(byte)15;

int ret2=0;
ret2 =year2<<(8*3);
ret2 +=month2<<(8*1);
ret2 +=date2;

ret=83888399
→101/0000000000001001/00001111(2進)

(2進)

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