c=a+++b 运算是什么意思? [英] What does the operation c=a+++b mean?

问题描述

下面的代码让我很困惑

int a=2,b=5,c;
c=a+++b;
printf("%d,%d,%d",a,b,c);

我预计输出为 3,5,8，主要是因为 a++ 表示 2 +1 等于 3，而 3 + 5 等于 8，所以我预计为 3,5,8.结果是3,5,7.有人可以解释为什么会这样吗?

I expected the output to be 3,5,8, mainly because a++ means 2 +1 which equals 3, and 3 + 5 equals 8, so I expected 3,5,8. It turns out that the result is 3,5,7. Can someone explain why this is the case?

推荐答案

被解析为c = a++ + b，而a++表示后增，即后增取a 的值来计算a + b == 2 + 5.

It's parsed as c = a++ + b, and a++ means post-increment, i.e. increment after taking the value of a to compute a + b == 2 + 5.

请永远写这样的代码.

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