The unsigned char data type , and byte data type will yield incorrect results and act as though they are signed types i . e . type char 無(wú)符號(hào)字符數(shù)據(jù)類(lèi)型和二進(jìn)制數(shù)據(jù)類(lèi)型將產(chǎn)生錯(cuò)誤的計(jì)算結(jié)果,會(huì)當(dāng)成有符號(hào)的數(shù)據(jù)類(lèi)型進(jìn)行計(jì)算。