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解释下++和=++

解释下++和=++

qq_氐語_0 2017-03-01 14:04:02
score++;能写成score=score++;吗?为什么
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++是有两种情况的,如:

a++;

++a;

这两个语句在不赋值时,两个语句执行完后,都是自加  1。

但是:

a = 1;

b=a++;

a = 1;

b=++a;

是不同的,前者b = 1,a = 2;

后者b = 2, a = 2;

两者最大区别就是先运算再赋值,还是先赋值再运算!

所以:

score++;可以写成score = ++score;

不能写成score = score++;

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1 反对 回复 2017-03-01
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慕瓜9220888

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