鍍金池/ 教程/ C/ Lua運(yùn)算符優(yōu)先級(jí)
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Lua運(yùn)算符優(yōu)先級(jí)

運(yùn)算符優(yōu)先級(jí)來確定條件的表達(dá)式中的分組。這會(huì)影響一個(gè)表達(dá)式如何計(jì)算。某些運(yùn)算符的優(yōu)先級(jí)高于其他。

例子

試試下面的例子就明白了在Lua編程語言的運(yùn)算符所有的優(yōu)先級(jí):

a = 20
b = 10
c = 15
d = 5

e = (a + b) * c / d;-- ( 30 * 15 ) / 5
print("Value of (a + b) * c / d is   :",e )

e = ((a + b) * c) / d; -- (30 * 15 ) / 5
print("Value of ((a + b) * c) / d is :",e )

e = (a + b) * (c / d);-- (30) * (15/5)
print("Value of (a + b) * (c / d) is :",e )

e = a + (b * c) / d;  -- 20 + (150/5)
print("Value of a + (b * c) / d is   :",e )

當(dāng)建立并執(zhí)行上面的程序它會(huì)產(chǎn)生以下結(jié)果:

Value of (a + b) * c / d is   :	90
Value of ((a + b) * c) / d is :	90
Value of (a + b) * (c / d) is :	90
Value of a + (b * c) / d is   :	50

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