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电子工程专辑
3 年
什么是整数溢出?溢出方式(回绕,截断),表现,危害
对于signed整型的溢出,C的规范定义是“undefined behavior”,也就是说,编译器爱怎么实现就怎么实现。对于大多数编译器来说,仍然是回绕。 无符号数会回绕(常绕过一些判断语句)。对于unsigned整型溢出,C的规范是有定义的——“溢出后的数会以2^(8*sizeof(type ...
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