数据结构顺序表的增删查改

头文件：

const int MaxSize=100;
template <class T> //模板类
class SeqList
{
public:
SeqList() {length=0;} //无参构造函数
SeqList(T a[],int n); //有参构造函数
~SeqList(){} //析构函数
int Length() {return length;} //求线性表长度
T Get(int i); //按位查找
int Locate(T x); //按值查找
void Insert (int i, T x); // 插入函数
T Delete(int i); //删除函数
void PrintList(); //遍历线性表，按序号依次输出各个元素。
private:
T data[MaxSize];
int length;
};
template<class T>
SeqList<T>::SeqList(T a[],int n) //有参构造函数
{
if(n>MaxSize)throw"参数非法";
for(int i=0;i<n;i++)
data[i]=a[i];
length=n;
}
template <class T>
void SeqList<T>::Insert(int i,T x) //插入函数
{
if (length>=MaxSize) throw "上溢";
if(i<1||i>length+1) throw "位置异常";
//请补全代码
for(int j=length;j>=i;j--)
data[i-1]=x;
length++;
}
template <class T>
T SeqList<T>::Get(int i) //按位查找函数
{
if(i<1||i>length) throw "查找位置非法";
else 
return data[i-1];
}
template <class T>
int SeqList<T>::Locate(T x) //按值查找函数
{
for(int i=0;i<length;i++)
if(data[i]=x)
return i+1;
}
template <class T>
T SeqList<T>::Delete(int i) //删除函数
{
if (int length=0)throw "下溢";
if(i<1||i>length)throw "位置异常";
for(i=0;i<length;i++)
data[i-1]=data[i];
length--;
return i;
}
template<class T>
void SeqList<T>::PrintList() // 遍历线性表
{
for(int i=0;i<length;i++)
{
cout<<data[i];
}
}

测试文件：

 #include <iostream>
#include "SeqList.h"
using namespace std;
void menu()
{
cout<<" 欢迎，欢迎!"<<endl;
cout<<" 1.插入查询"<<endl;
cout<<" 2.删除函数"<<endl;
cout<<" 3.求表长"<<endl;
cout<<" 4.按值查找"<<endl;
cout<<" 5.按位查找"<<endl;
cout<<" 6.遍历线性表"<<endl;
cout<<" 7.退出"<<endl;
cout<<" "<<endl;
cout<<" 请选择编号:"<<endl;
}
int main()
{
int i,j,x;
int a[7]={12,15,24,56,67,68,86};
SeqList<int> s1(a,7);
int flag=1;
while(flag)
{
menu();
cin>>j;
switch(j)
{
case 1:
{
try
{
cout<<"显示要插入的位序及数值："<<endl;
cin>>i>>x;
cout<<endl;
s1.Insert(i,x);
s1.PrintList();
}
catch (char *s){cout<<s<<endl;}
};
break;
case 2:
{
try
{
cout<<"输入元素所在位置";
cin>>i;
x=s1.Delete(i);
cout<<"已删除:"<<x<<endl;
cout<<"删除数据后表变为:"<<endl;
s1.PrintList();
}
catch (char *s){cout<<s<<endl;}
};
break;
case 3:
{
try 
{
s1.Length();
cout<<"线性表长度为:"<<s1.Length()<<endl;
}
catch(char *s){cout<<s<<endl;}
};
break;
case 4:
{
try
{
cout<<"输入查找数据x:"<<endl;
cin>>x;
s1.Locate(x);
cout<<"所查数据在第"<<s1.Locate(x)<<"位"<<endl;
}
catch(char *s){cout<<s<<endl;}
};
break;
case 5:
{
try
{
cout<<"查找位置i=";
cin>>i;
s1.Get(i);
cout<<"该位置元素为："<<s1.Get(i)<<endl;
}
catch(char *s){cout<<s<<endl;}
};
break;
case 6:
{
try
{
s1.PrintList();
}
catch(char *s){cout<<s<<endl;}
};
break;
case 7:
flag=0;
break;
default:cout<<"错误!!!"<<endl;
break;
}
}
return 0;
}