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This article mainly introduces the relevant knowledge of "how to use # define of C language". The editor shows you the operation process through an actual case. The operation method is simple, fast and practical. I hope this article "how to use # define of C language" can help you solve the problem.

Typedef vs # define

# define is a C directive that defines aliases for various data types, similar to typedef, but with the following differences:

Typedef is limited to defining symbolic names for types. # define can define aliases not only for types, but also for numeric values. For example, you can define 1 as ONE.

The typedef is interpreted by the compiler, and the # define statements are processed by the precompiler.

Here is the simplest use of # define:

Example

# include

# define TRUE 1

# define FALSE 0 int main () {

Printf ("value of TRUE:% d\ n", TRUE)

Printf ("value of FALSE:% d\ n", FALSE)

Return 0

}

When the above code is compiled and executed, it produces the following results:

TRUE value: 1FALSE value: 0 about "C language # define how to use" content is introduced here, thank you for reading. If you want to know more about the industry, you can follow the industry information channel. The editor will update different knowledge points for you every day.

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