notes:cprog
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| notes:cprog [2018/11/16 02:50] – [Other] sdiarra | notes:cprog [2018/11/16 03:14] – [Notes] sdiarra | ||
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| Although **typedef** appears to be defining only types, it removes some overheads down the road as a developer, | Although **typedef** appears to be defining only types, it removes some overheads down the road as a developer, | ||
| + | ------- | ||
| + | <color # | ||
| + | |||
| + | Undef is a directive in that is available in C and C++. It as the form of #undef when called. Undef is used as a complement to the #define, as a preprocessor directive it is used to enclosed a #define statement to make sure there is no naming conflict and constrict one's logic within a set of code. Let's take a macro for example it is efficient for macros primarily because of the fact that it does common tasks such print, as many modules take have various print functions, the ideal way to make sure there is no conflict is to use undef. This is how it is used: | ||
| + | |||
| + | < | ||
| + | #define pprintf1() //for pretty-printf | ||
| + | #undef pprintf1() | ||
| + | </ | ||
| + | |||
| + | easy peasy! | ||
| ======Other====== | ======Other====== | ||
| ------- | ------- | ||
notes/cprog.txt · Last modified: 2018/11/20 13:24 by sdiarra
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