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單鏈表實現氣泡排序演算法(C實現)

本實現主要採用交換指標的方法,其中附加有單鏈表及其相關的實現

#include <stdio.h>

struct Node;

typedef struct Node *PtrToNode;
typedef PtrToNode List;
typedef PtrToNode Position;
typedef int ElementType;

struct Node
{
	ElementType Element;
	Position Next;
};

List initList()
{
	List L = (List)malloc(sizeof(struct Node));
	L->Next = NULL;
        return L;
}

void insertElement(List L)
{
	int element;
	while(scanf("%d", &element))
	{
		Position tmp = (Position)malloc(sizeof(struct Node));
		tmp->Element = element;
		tmp->Next = L->Next;
		L->Next = tmp;
	}
}

void printList(List L)
{
	Position P = L->Next;
	printf("L->");
	while(P != NULL)
	{
		printf("%d - >", P->Element);
		P = P->Next;
	}
	printf("NULL\n");
}

int get_length(List L)
{
	int i = 0;
	Position P = L->Next;
	while(P != NULL)
	{
		i++;
		P = P->Next;
	}
	return i;
}

void BubblePoint(List L)
{
	Position pre;
	Position cur;
	Position next;
	
	int i, j;
	i = get_length(L);
        printf("length = %d\n", i);
	
	while(i != 1)
	{
		pre = L;
                cur = L->Next;
                next = cur->Next;
                j = i;
		i--;
		while(j != 1)
		{
			j--;
			if(cur->Element > next->Element)
			{
				cur->Next = next->Next;
				pre->Next = next;
				next->Next = cur;
				
				pre = next;
				next = cur->Next;
			}
			else
			{
				pre = cur;
				cur = next;
				next = next->Next;
			}
		}
	}	
}

int main(int argc, char **argv)
{
	List L;
	L = initList(L);
	insertElement(L);
        printList(L);
	BubblePoint(L);
	printList(L);
}

執行結果如下: