函数体

#include"SeqList.h"

void SeqList::init(int n)
{
    this->ptr=new data[n];
    
    this->len=0;
    this->size=n;
}

bool SeqList::empty()
{
    return this->len=0;
}

bool SeqList::full()
{
    return this->size==this->len;
}

void SeqList::push_back(data e)
{
    if(this->full())
    {
        return ;
    }
    this->ptr[len++]=e;
}

void SeqList::show()
{
    for(int i=0;i<this->len;i++)
    {
        cout<<"元素"<<len<<this->ptr[i]<<" ";
    }
    cout<<endl;
}

void SeqList::insert(int index)
{
    if(this->full())
    {
        return ;
    }
    if(index>this->len+1||index<=0||index>this->size)
    {
        cout<<"插入错误"<<endl;
        return;
    }
    data e;
    cout<<"输入要插入的元素";
    cin>>e;
    for(int i=len-1;i>=index-1;i--)
    {
        this->ptr[i+1]=this->ptr[i];
    }
    this->ptr[index-1]=e;
    this->len++;
}

void SeqList::delete_s(int index)
{
    if(index>this->len+1||index<=0||index>this->size)
    {
        cout<<"删除位置不合理"<<endl;
        return;
    }
    for(int i=index;i<this->len;i++)
    {
        this->ptr[i-1]=this->ptr[i];
    }
    this->len--;
}

void SeqList::pop_back()
{
     if(this->len==0)
     {
             cout<<"顺序表为空"<<endl;
                               return;
                           }
      this->len--;
                         }
                       

data SeqList::get_len()
{
    return this->len;
}

data SeqList::get_index(int index)
{
    if(index>this->len||index<0||index>=this->size)
    {
        cout<<"位置不合理";
     return -1;    
    }
    return this->ptr[index-1];
}

void SeqList::sort(bool flag)
{
    if(flag){
           for(int i=1;i<this->len;i++){
               for(int j=0;j<this->len-i;j++){
                   if(this->ptr[j]>this->ptr[j+1]){
                       data t = this->ptr[j];
                       this->ptr[j] = this->ptr[j+1];
                       this->ptr[j+1] = t;
                   }
               }
           }
       }
else{
           for(int i=1;i<this->len;i++){
               for(int j=0;j<this->len-i;j++){
                   if(this->ptr[j]<this->ptr[j+1]){
                       data t = this->ptr[j];
                       this->ptr[j] = this->ptr[j+1];
                       this->ptr[j+1] = t;
                   }
               }
           }
       }
   }

头文件

#ifndef SEQLIST_H
#define SEQLIST_H
#include<iostream>
#include<memory.h>
#include<stdlib.h>
#include<string.h>

using data=int;
using namespace std;

class SeqList
{
private:
    data *ptr;
    int size;
    int len=0;
public:
    void init(int n);
    bool empty();
    bool full();
    void push_back(data e);
    void show();
    void insert(int index);
    void delete_s(int index);
    void pop_back();
    data get_len();
    data get_index(int index);
    void sort(bool flag);
};
#endif // SEQLISH_H

主函数

#include"SeqList.h"

using namespace std;

int main()
{
    SeqList s1;
    int n;
    cout << "输入顺序表的大小";
    cin>>n;
    s1.init(5);
    cout<<"输入要插入的数据"<<endl;
    for(int i=0;i<5;i++)
    {
        string s;
        cin>>s;
        int e=stoi(s);
        s1.push_back(e);
    }
    s1.show();
    int add;
    cout<<"输入要插入的位置" ;
    getchar();
    cin>>add;
    s1.insert(add);
    s1.show();
    cout<<"输入要删除的位置";
    cin>>add;
    s1.delete_s(add);
    s1.show();
    int c;
    cout<<"是否尾删（1为yes/2为no）";
    cin>>c;
    if(c==1)
    {
        s1.pop_back();
    }
    s1.show();
    int changdu=s1.get_len();
    cout<<"顺序表长度为"<<changdu<<endl;
    int index;
    cout<<"输入要查找位置的元素";
    cin>>index;
    cout<<index<<"元素"<<s1.get_index(index)<<endl;
    cout<<"(输入1为升序排序/2为降序排序)";
    cin>>c;
    s1.sort(c);
    s1.show();
    return 0;
}