Struct in C

Declaration

struct is keyword for struct

Generally

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struct tag_name {
	// members
};

Note: Two of tag_name, member-list and variable-list must present.

Using typedef

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typedef struct
{
    int a;
    char b;
    double c; 
} Simple2;

//现在可以用Simple2作为类型声明新的结构体变量
Simple2 u1, u2[20], *u3;

Usage

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struct COMPLEX
{
    char string[100];
    // Other struct
    struct SIMPLE a;
    // Pointer to itself
    struct COMPLEX *next_node;
};