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Declaration and Definition in C

2016-08-23

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Definition: 定義

occurs in only one place (只能出現一次)

specifies the type of an object; reserves storage for it; is used to create new objects

example:

int my_array[100];

1	int my_array[100];

Declaration: 宣告

can occur multiple times (可以出現多次)

describes the type of an object; is used to refer to objects defined elsewhere (e.g., in another file)

example:

extern int my_array[];

1	extern int my_array[];

Declaration and Definition in C

Definition: 定義

Declaration: 宣告

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