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[C] C Programming Q & A - 03

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发表于 2009-6-14 18:29:39 | 显示全部楼层 |阅读模式
Question :
What is a pragma?


























Answers:
The #pragma preprocessor directive allows each compiler to implement compiler-specific features that can be turned on and off with the #pragma statement.

For instance, your compiler might support a feature called loop optimization. This feature can be invoked as a command-line option or as a #pragma directive.

To implement this option using the #pragma directive, you would put the following line into your code:

#pragma loop_opt(on)

Conversely, you can turn off loop optimization by inserting the following line into your code:

#pragma loop_opt(off)

#pragma O(2)
etc..
发表于 2009-6-17 18:04:16 | 显示全部楼层
能翻成中文的吗?
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发表于 2009-6-20 20:30:24 | 显示全部楼层
学习来啦!!我是新手
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