中国最强军是38军吗:C＋＋ 数据结构 有关的问题

#include<iostream.h>
#include<stdio.h>
#include<stdlib.h>
#include<malloc.h>
#define LIST_INIT_SIZE 20
#define ERROR 0
#define TURE 1
#define OK 1
#define LISTINCREMENT 10
#define OVERFLOW 0
typedef int ElemType;
typedef int Status;
typedef struct{
//定义线性表
ElemType *elem;
int length;
int listsize;
}SqList;
//创建一顺序表
Status InitList_Sq(SqList L){
L.elem=(ElemType*)malloc (LIST_INIT_SIZE*sizeof(ElemType));
if(!L.elem)exit(OVERFLOW);
L.length=0;
L.listsize=LIST_INIT_SIZE;
return OK;
}
//顺序表指定位置插入
ElemType ListInsert_Sq(SqList L,int i,ElemType e){ ElemType *newbase;
if(i<1||i>L.length+1)return ERROR;//判断i是否合法
if(L.length>=L.listsize){
newbase=(ElemType*)realloc(L.elem,(L.listsize+LISTINCREMENT)*sizeof(ElemType));//当当前的线性表满时追加单元
if(!newbase)exit(OVERFLOW );
L.elem=newbase;
L.listsize=L.listsize+LISTINCREMENT;
}
ElemType *q=&(L.elem[i-1]);
ElemType *p;
for(p=&(L.elem[L.length-1]);p>=q;--p)
*(p+1)=*p;
*q=e;
++L.length;
return OK;
}

//从键盘动态输入数据
void Dongtaishuru(SqList L){
int i;
cout<<"请输入要输入的数据个数："<<endl;
cin>>i;
cout<<"元素个数是"<<i<<endl;
for(int j=1;j<=i;j++){int p;
cin>>p;
ListInsert_Sq(L,1, p);
}
}
//线性表元素输出
void Print(SqList L){ cout<<"顺序表元素是:"<<endl;
for(int i=0;i<L.length;i++){ cout<<L.elem[i]<<endl;}
}
//主函数
void main(){
SqList M;
InitList_Sq(M);
Dongtaishuru(M);
Print(M);
}
编译通过 但是为什么不能执行Print() 函数 将顺序表的元素打印出来？？