顺序表

#include<iostream>
#include"cstdlib"
#include<string>

using namespace std;

//定义结构体类型 
struct SeqList{
    int MAXNUM;
    int n;
    int *element;
};

typedef struct SeqList *PSeqList;

//创建空的循序链表 
PSeqList  createNullList_seq(int m); 
//判断链表是否为空 
int isNullList_seq(PSeqList palist) ;
//求元素的下标
int locate_seq(PSeqList palist, int x);
//顺序表的插入
int insertPre_seq(PSeqList palist,int p, int x);
//删除元素 
int deleteP_seq(PSeqList palist, int p);
// 打印顺序表中的元素
void printSeqList(PSeqList palist);

PSeqList  createNullList_seq(int m)
{

PSeqList palist=(PSeqList) malloc(sizeof(SeqList));
if(palist!=NULL)
{
    palist->element=(int *) malloc(sizeof(int)*m);
    if(palist->element)
    {
        palist->MAXNUM=m;
        palist->n=0;
        return palist; 
    }
    else free(palist);
    
}
    
 cout<<" out of  space "<<endl;
 return NULL;
    
 } 
 
 
 int isNullList_seq(PSeqList palist)
 {
    if(palist->n==0) 
     return 1;
     return 0;
 }


int locate_seq(PSeqList palist, int x)
{
    for(int i=0; i<palist->n; i++)
    {
        if(palist->element[i]==x)
        return i;
        else
         return -1;
    }
}


//在palist所指顺序表下标为p的元素插入x 
int insertPre_seq(PSeqList palist,int p, int x)
{
    int q;
    
    if(palist->n>=palist->MAXNUM) 
    {
        cout<<" overflow "<<endl;
        return 0;
    }
    
    if(p<0||p>palist->n)
    {
       cout<<" not exist locate"<<endl;
       return 0;
    }
    

 /*
 for(q=p; q<palist->n; q++) 
 移动元素只能从后到前面，注意bug 
 
 */
    
    
    for(q=palist->n-1; q>=p; q--)
 {
    palist->element[q+1]=palist->element[q];
 }
    palist->element[p]=x;
    
    palist->n=palist->n+1;
    
    return 1;

}


int deleteP_seq(PSeqList palist, int p)
{
    if(p<0||p>palist->n-1)
    {
        cout<<" not exist"<<endl;
        return 0;
    }
    
    for(int i=p; i<palist->n-1; i++)
    {
        palist->element[i]=palist->element[i+1];
    }
    
    palist->n=palist->n-1;
    return 1;   
 } 
 

void printSeqList(PSeqList palist)
{
    if(palist->n==0)
    cout<<" 没有元素"<<endl;
    
  for(int i=0; i<palist->n; i++)
  cout<<" "<<palist->element[i];
     
}


int main()
{
    
    PSeqList p=createNullList_seq(100);
    
    int  tag=isNullList_seq(p);
    if(tag)
    cout<<"-------- 是空链表"<<endl;
    else
    cout<<"-------- 不是空链表"<<endl;
    
    for(int i=1; i<9; i++)
    {
            insertPre_seq(p,0,i);
            cout<<"---"<<i<<endl;
    }

    printSeqList(p);
    
    return 0;
}

-------- 是空链表
---1
---2
---3
---4
---5
---6
---7
---8
 8 7 6 5 4 3 2 1
--------------------------------
Process exited after 0.03496 seconds with return value 0
请按任意键继续. . .