How do you override a defined macro?

How do you override a defined macro?

题目类型: 技术面试题

这是一道技术面试题，常见于澳洲IT公司面试中。

难度: hard

标签: interviewbit, c, topic-specific, systems

参考答案摘要

To override a defined macro we can use #ifdef and #undef preprocessors as follows: #ifdef A #undef A #endif #define A 10 If macro A is defined, it will be undefined using undef and then defined again ...

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