网课笔记

//顺序表
#include <iostream>
using namespace std;
typedef int ElemType;

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

bool InitList(SqList &L, int s) { //顺序表初始化
	if (s <= 0)
		return false;
	L.data = new ElemType[s];
	if (L.data == NULL)
		return false;
	L.size = s;
	L.length = 0;
	return true;
}

int ListLength(SqList &L) { //表长
	return L.length;
}

int Locate(SqList &L, const ElemType &e) { //按值查找
	for (int i = 0; i < L.length; i++)
		if (L.data[i] == e)
			return i + 1;
	return false;
}

bool GetData(SqList &L, int i, ElemType &e) { //获得第i个元素
	if (i >= 1 && i <= L.length) {
		e = L.data[i - 1];
		return true;
	}
	return false;
}

bool InsList(SqList &L, int i, ElemType e) { //在第i个元素前插入
	if (i < 1 || i > L.length + 1)
		return false;
	if (L.length == L.size) {
		ElemType *temp = new ElemType[2 * L.size];
		if (temp == NULL)
			return false;
		for (int i = 0; i < L.length; i++)
			temp[i] = L.data[i];
		delete[] L.data;
		L.data = temp;
		L.size = L.size * 2;
	}
	for (int k = L.length - 1; k >= i - 1; k--)
		L.data[k + 1] = L.data[k];
	L.data[i - 1] = e;
	return true;
}

bool DelList(SqList &L, int i) { //删除第i个元素
	if (i >= 1 && i <= L.length) {
		for (int k = i; k < L.length; k++)
			L.data[k - 1] = L.data[k];
		L.length--;
		return true;
	} else
		return false;
}

void DestroyList(SqList &L) { //销毁顺序表
	delete[] L.data;
	L.data = NULL;
	L.length = 0;
	L.size = 0;
}

void ClearList(SqList &L) { //清空顺序表
	L.length = 0;
}

bool EmptyList(SqList &L) { //判断顺序表是否为空
	if (L.length == 0)
		return true;
	else
		return false;
}

void DispList(SqList &L) { //遍历顺序表，输出所有元素
	for (int i = 0; i < L.length; i++)
		cout << L.data[i] << " ";