C++ char 與uchar區別

原創 对望小秘 2020-02-24 20:29

char 是有符號的 。
unsigned char 是無符號的,裏面全是正數 。
兩者都作爲字符用的話是沒有區別的，但當整數用時有區別： char 整數範圍爲-128到127( 0x80__0x7F)， 而unsigned char 整數範圍爲0到255( 0__0xFF ) 有時候想把整數數值限在255範圍內，也用unsigned char，這個類型在嵌入式用的多

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