数据结构 顺序表2.1

• 线性表（数组）*

• [ 2022，5.11]

1. 初始化
2. 增
3. 删
4. 改
5. 查
6. 算法复杂度分析

结构体

typedef struct
{
	int maxsize;
	int length;
	ElemType* data;
}SqList;

初始化

void InitList(SqList& L)
{
	L.data = (ElemType*)malloc(sizeof(ElemType) * Initsize);
	L.maxsize = Initsize;
	for (int i = 0; i < L.maxsize; i++)
	{
		L.data[i] = 0;
	}
	L.length = 0;
}

动态增加表长

void CreaseSize(SqList& L, int len)
{
	int* p = L.data;
	L.data = (ElemType*)malloc(sizeof(ElemType) * (len + L.maxsize));
	for (int i = 0; i < L.maxsize; i++)
	{
		L.data[i] = p[i];
	}
	for (int i = L.maxsize; i < L.maxsize + len; i++)
	{
		L.data[i] = 0;
	}
	L.maxsize = L.maxsize + len;
	free(p);
}

数据插入

bool InsertList(SqList& L, int n, int m) //n 为插入位置，m为插入元素个数
{
	if (n<0 && n>L.length && L.length + m > L.maxsize) {
		printf("insert is false!n");
		return false;
	}
	for (int i = n; i < L.length + m; i++) {
		L.data[i + m] = L.data[i];
	}
	for (int i = n; i < L.length + n; i++)
	{
		scanf("%d", &L.data[i]);
	}
	L.length = L.length + m;
	printf("insert is true!n");
	return true;
}

数据删除

bool DeleteList(SqList& L, int n)
{
	if (n < 0 && n >= L.length) {
		printf("Delete is false!n");
		return false;
	}
	for (int i = n; i < L.length; i++) {
		L.data[i] = L.data[i + 1];
	}
	L.data[L.length] = 0;
	L.length--;
	printf("Delete is true!n");
	return true;
}

数据更改

bool AlterList(SqList& L, int n)//
{
	if (n<0 && n>L.length)
	{
		printf("Alter is false!n");
		return false;
	}
	scanf("%d", &L.data[n]);
	printf("Alter is ture!n");
	return true;
}

数据查询

ElemType CheckList(SqList L, int n)
{
	if (n<0 && n>L.length) {
		printf("Check is false!n");
		return false;
	}
	printf("Check is true!n");
	return L.data[n];
}

算法复杂度

1. 增 ：O(n)
2. 删 ：O(n)
3. 改 ：O(1)
4. 查 ：O(1)