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13问答网 > #define SUB(a) (a)-(a)这是什么意思？还是印错了？

#define SUB(a) (a)-(a)这是什么意思？还是印错了？

2025-03-15 07:09:53

推荐回答（1个）

回答1：

经过运算！！答案选C -20；答案：
预处理命令！！！没有错。。理解不深、、 SUB （a） (a)-(a) 就像f(x) = （x） - （x）懂？数学知识！！ d=SUB(a+b)*c 因为优先级先进行 SUB(a+b) 即 (a+b) - (a+b) 然后执行乘法操作。。
(a+b)-(a+b)*5 = -20；把(a+b) 当成整体！！不懂追问！

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