帶頭雙向迴圈鍊錶

首先，我們來看一下帶頭雙向迴圈鍊錶的結構：

目錄

帶頭雙向迴圈鍊錶結點的定義：

相關操作介面：

1、初始化 && 獲取乙個結點

2、銷毀鍊錶 

3、尾插

4、頭插

5、指定元素查詢

6、任意位置插入

7、 尾刪

8、頭刪

9、任意位置刪除

10、列印鍊錶

附上完整**：

typedef int datatype;

typedef struct node
node, *pnode, *plist;

pnode buynode(datatype d)

ptr->data = d;
ptr->next = null;
ptr->prev = null;
return ptr;
}plist initlist()

void destorylist(plist plist)

}

void pushback(plist plist, datatype d)

void pushfront(plist plist, datatype d)

pnode findlist(plist plist, datatype d)

cur = cur->next;
} return null;
}

void insertlist(pnode pos, datatype d)

void popback(plist plist)

void popfront(plist plist)

void eraselist(pnode pos)

void printlist(plist plist)

printf("head\n");
}

dlist.h

#ifndef __dlist_h__

#define __dlist_h__
#include #include #include typedef int datatype;
typedef struct node
node, *pnode, *plist;
plist initlist();
void destorylist(plist plist);
pnode buynode(datatype d);
void pushback(plist plist, datatype d);
void pushfront(plist plist, datatype d);
pnode findlist(plist plist, datatype d);
void insertlist(pnode pos, datatype d);
void popback(plist plist);
void popfront(plist plist);
void eraselist(pnode pos);
void printlist(plist plist);
#endif //__dlist_h__

#include "dlist.h"

pnode buynode(datatype d)
ptr->data = d;
ptr->next = null;
ptr->prev = null;
return ptr;
}plist initlist()
void destorylist(plist plist)
}void pushback(plist plist, datatype d)
void pushfront(plist plist, datatype d)
pnode findlist(plist plist, datatype d)
cur = cur->next;
} return null;
}void insertlist(pnode pos, datatype d)
void popback(plist plist)
void popfront(plist plist)
void eraselist(pnode pos)
void printlist(plist plist)
printf("head\n");
}

#include "dlist.h"

void pushbacktest()
void pushfronttest()
void findlisttest()
else
destorylist(plist);
}void insertlisttest()
else
destorylist(plist);
}void popbacktest()
void popfronttest()
void eraselisttest()
else
destorylist(plist);
}int main()

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