2024-3-7

2024-03-07 22:59:04 +08:00
parent 79c0a970f0
commit 68d6c32692
5 changed files with 411 additions and 0 deletions
--- a/homework240306/SqList.h
+++ b/homework240306/SqList.h
@@ -0,0 +1,175 @@
+template <class DT>
+struct SqList									// 顺序表
+{
+	DT* elem;									// 表首址
+	int length;									// 表长
+	int size;									// 表容量
+};
+
+//算法2.1
+template <class DT>
+bool PriorElem_e(SqList<DT> L, DT e, DT& pre_e)				// 求值为e的元素前驱
+{
+	int k;
+	k = LocateElem_e(L, e);					//
+	if (k > 1)
+	{
+		GetElem_i(L, k - 1, pre_e);
+		return false;
+	}
+	else
+		return true;
+}
+
+//【算法2.2】									初始化
+template <class DT>
+bool InitList(SqList<DT>& L, int m)
+{
+	L.elem = new DT[m];							// 申请表空间
+	if (L.elem == NULL)
+	{
+		cout << "未创建成功！";					// 申请不成功，退出
+		exit(1);
+	}
+	L.length = 0;									// 申请成功，属性赋值。空表，表长为0 
+	L.size = m;									// 表容量为m
+	return true;
+}
+
+//【算法2.3】									创建表元素
+template <class DT>
+bool CreateList(SqList<DT>& L, int n)
+{
+	int i;
+	if (n > L.size)								// 1.元素个数大于表容量，不能创建。
+	{
+		cout << "元素个数大于表长，不能创建！" << endl;
+		return false;
+	}
+	cout << "请依次输入" << n << "个元素值：" << endl;	// 2.依位序输入各元素值
+	for (i = 1; i <= n; i++)
+		cin >> L.elem[i - 1];
+	L.length = n;									// 3.表长为创建的元素个数
+	return true;
+}
+
+//【算法2.4】									销毁顺序表
+template <class DT>
+void DestroyList(SqList<DT>& L)
+{
+	delete[] L.elem;							// 1.释放表空间
+	L.length = 0;									// 2.属性赋值
+	L.size = 0;
+}
+
+//【算法2.5】									获取第i个元素值
+template<class DT>
+bool GetElem_i(SqList<DT> L, int i, DT& e)
+{
+	if (i<1 || i>L.length)						// 1.位序不合理，返回false
+	{
+		cout << "该元素不存在！" << endl;
+		return false;
+	}
+	e = L.elem[i - 1];								// 2. 否则，获取第i个元素值
+	return true;								// 返回true
+}
+
+//【算法2.6】									按值查找
+template<class DT>
+int LocateElem_e(SqList<DT> L, DT e)
+{
+	for (int i = 1; i <= L.length; i++)				// 顺序查找
+		if (L.elem[i - 1] == e)						// 1.找到
+			return i;							// 返回元素位序
+	return 0;									// 2.未找到，返回0
+}
+
+//【算法2.7】
+template<class DT>
+bool InsertElem_i(SqList<DT>& L, int i, DT e)
+{
+	if (L.length >= L.size)						// 1.表满，不能插入
+		return false;
+	if (i<1 || i>L.length + 1)						// 2.插入位置不合理，不能插入
+		return false;
+	for (int j = L.length; j >= i; j--)				// 3. an~ai依次后移
+		L.elem[j] = L.elem[j - 1];
+	L.elem[i - 1] = e;
+	L.length++;
+	return true;								// 插入成功，返回true
+}
+
+//【算法2.8】									删除第i个元素
+template<class DT>
+bool DeleElem_i(SqList<DT>& L, int i)
+{
+	if (L.length == 0)								// 1.表空，不能删除
+		return false;
+	if (i<1 || i>L.length)						// 2.删除位置不合理，不能插入
+		return false;
+	for (int j = i; j < L.length; j++)				// 3. ai+1~an依次前移
+		L.elem[j - 1] = L.elem[j];
+	L.length--;
+	return true;								// 删除成功，返回true
+}
+
+
+//【算法2.9】
+template<class DT>
+bool PutElem(SqList<DT>& L, int i, DT e)			// 修改第i个元素的值
+{
+	if (i<1 || i>L.length)						// 1.位序不合理，不能修改，
+		return false;							// 返回false
+	L.elem[i - 1] = e;								// 2.重置第i个元素值
+	return true;								// 3.修改成功，返回true
+}
+
+// 清空顺序表
+template<class DT>
+void ClearList(SqList<DT>& L)
+{
+	L.length = 0;									 // 空表，表长为0
+}
+
+
+// 测表长
+template<class DT>
+int ListLength(SqList<DT> L)
+{
+	return L.length;
+}
+
+
+template<class DT>
+bool ListEmpty(SqList<DT> L)					// 测表空
+{
+	if (L.length == 0)								 // 空表，返回true
+		return true;
+	else
+		return false;							// 非空表，返回false
+}
+
+template<class DT>
+bool ListFull(SqList<DT> L)
+{
+	if (L.length == L.size)						// 表满，返回true
+		return true;
+	else
+		return false;							// 表不满，返回false
+}
+
+//【算法2.10】									遍历输出
+template <class DT>
+void DispList(SqList<DT> L)
+{
+	int i;
+	for (i = 1; i <= L.length; i++)					// 依位序输出元素值
+	{
+		cout << L.elem[i - 1] << "\t";
+
+	}
+	cout << endl;
+}
+
+
--- a/homework240306/homework240306.sln
+++ b/homework240306/homework240306.sln
@@ -0,0 +1,31 @@
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--- a/homework240306/homework240306.vcxproj
+++ b/homework240306/homework240306.vcxproj
@@ -0,0 +1,138 @@
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--- a/homework240306/homework240306.vcxproj.filters
+++ b/homework240306/homework240306.vcxproj.filters
@@ -0,0 +1,27 @@
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--- a/homework240306/main.cpp
+++ b/homework240306/main.cpp
@@ -0,0 +1,40 @@
+#include <iostream>
+using namespace std;
+#include "SqList.h"
+template <class DT>
+void Intersection(SqList<DT>& A, const SqList<DT>& B)
+{
+	int k = 0;
+	for (int i = 0; i < A.length; ++i)
+	{
+		if (LocateElem_e(B, A.elem[i]) > 0)
+		{
+			A.elem[k++] = A.elem[i];
+		}
+	}
+	A.length = k;
+}
+int main()
+{
+	SqList<int> A;
+	SqList<int> B;
+	InitList(A, 32);
+	InitList(B, 32);
+	int length_a, length_b;
+	cout << "请输入集合A的元素个数: ";
+	cin >> length_a;
+	CreateList(A, length_a);
+	cout << "请输入集合B的元素个数: ";
+	cin >> length_b;
+	CreateList(B, length_b);
+	cout << "集合A: ";
+	DispList(A);
+	cout << "集合B: ";
+	DispList(B);
+	Intersection(A, B);
+	cout << "A∩B: ";
+	DispList(A);
+	DestroyList(A);
+	DestroyList(B);
+	return 0;
+}