[情報] 運算優先順序表

看板C_and_CPP (C/C++)作者FRAXIS (喔喔)時間16年前 (2009/07/03 23:48)推噓8(8推 0噓 6→)

留言14則, 7人參與討論串1/1

這是以前看書的筆記，除了一般常見的運算優先順序和結合順序的整理之外，還有lvalue和rvalue的區別，以及控制evaluation order的整理。運算子說明範例結果結合性控制運算順序 () Grouping (exp) exp N/A No ---------------------------------------------------------------------------- () Function call rexp(rexp,rexp) rexp L-R No [] Subscript rexp[rexp] lexp L-R No . Structure member lexp.member lexp L-R No -> Struct pointer member lexp->member lexp L-R No ++ Postfix increment lexp++ rexp L-R No -- Postfix decrement lexp-- rexp L-R No ---------------------------------------------------------------------------- ! Logical negate !rexp rexp R-L No ~ One's complement ~rexp rexp R-L No + Unary plus +rexp rexp R-L No - Unary minus -rexp rexp R-L No ++ Prefix increment ++lexp rexp R-L No -- Prefix decrement --lexp rexp R-L No * Indirection *rexp lexp R-L No & Address of &lexp rexp R-L No sizeof Size in bytes sizeof rexp rexp R-L No sizeof(type) rexp R-L No ----------------------------------------------------------------------------- (type) Type conversion (type)rexp rexp R-L No ----------------------------------------------------------------------------- * Multiplication rexp * rexp rexp L-R No / Division rexp / rexp rexp L-R No % Integer remainder rexp % rexp rexp L-R No ----------------------------------------------------------------------------- + Addition rexp + rexp rexp L-R No - Subtraction rexp - rexp rexp L-R No ----------------------------------------------------------------------------- << Left shift rexp << rexp rexp L-R No >> Right shift rexp >> rexp rexp L-R No ----------------------------------------------------------------------------- > Greater than rexp > rexp rexp L-R No >= Greater than or equal rexp >= rexp rexp L-R No < Less than rexp < rexp rexp L-R No <= Less than or equal rexp <= rexp rexp L-R No ----------------------------------------------------------------------------- == Equal to rexp == rexp rexp L-R No != Not equal to rexp != rexp rexp L-R No ----------------------------------------------------------------------------- & Bitwise AND rexp & rexp rexp L-R No ----------------------------------------------------------------------------- ^ Bitwise exclusive OR rexp ^ rexp rexp L-R No ----------------------------------------------------------------------------- | Bitwise inclusive OR rexp | rexp rexp L-R No ----------------------------------------------------------------------------- && Logical AND rexp && rexp rexp L-R Yes ----------------------------------------------------------------------------- || Logical OR rexp || rexp rexp L-R Yes ----------------------------------------------------------------------------- ?: Conditional rexp?rexp:rexp rexp R-L Yes ----------------------------------------------------------------------------- = Assignment lexp = rexp rexp R-L No += Add to lexp += rexp rexp R-L No -= Subtract from lexp -= rexp rexp R-L No *= Multiply by lexp *= rexp rexp R-L No /= Divide by lexp /= rexp rexp R-L No %= Modulo by lexp %= rexp rexp R-L No <<= Shift left by lexp <<= rexp rexp R-L No >>= Sgift right by lexp >>= rexp rexp R-L No &= AND with lexp &= rexp rexp R-L No ^= Exclusive OR with lexp ^= rexp rexp R-L No |= Inclusive OR with lexp |= rexp rexp R-L No ----------------------------------------------------------------------------- , Comma rexp, rexp rexp L-R Yes -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.119.162.51