4-2 顺序表操作集 (20分)

本题要求实现顺序表的操作集。

函数接口定义：

List MakeEmpty();
Position Find( List L, ElementType X );
bool Insert( List L, ElementType X, Position P );
bool Delete( List L, Position P );
其中List结构定义如下：

typedef int Position;
typedef struct LNode *List;
struct LNode {
ElementType Data[MAXSIZE];
Position Last; /* 保存线性表中最后一个元素的位置 */
};
各个操作函数的定义为：

List MakeEmpty()：创建并返回一个空的线性表；

Position Find( List L, ElementType X )：返回线性表中X的位置。若找不到则返回ERROR；

bool Insert( List L, ElementType X, Position P )：将X插入在位置P并返回true。若空间已满，则打印“FULL”并返回false；如果参数P指向非法位置，则打印“ILLEGAL POSITION”并返回false；

bool Delete( List L, Position P )：将位置P的元素删除并返回true。若参数P指向非法位置，则打印“POSITION P EMPTY”（其中P是参数值）并返回false。

裁判测试程序样例：

#include 
#include 

#define MAXSIZE 5
#define ERROR -1
typedef enum {false, true} bool;
typedef int ElementType;
typedef int Position;
typedef struct LNode *List;
struct LNode {
    ElementType Data[MAXSIZE];
    Position Last; /* 保存线性表中最后一个元素的位置 */
};

List MakeEmpty(); 
Position Find( List L, ElementType X );
bool Insert( List L, ElementType X, Position P );
bool Delete( List L, Position P );

int main()
{
    List L;
    ElementType X;
    Position P;
    int N;

    L = MakeEmpty();
    scanf("%d", &N);
    while ( N-- ) {
        scanf("%d", &X);
        if ( Insert(L, X, 0)==false )
            printf(" Insertion Error: %d is not in.\n", X);
    }
    scanf("%d", &N);
    while ( N-- ) {
        scanf("%d", &X);
        P = Find(L, X);
        if ( P == ERROR )
            printf("Finding Error: %d is not in.\n", X);
        else
            printf("%d is at position %d.\n", X, P);
    }
    scanf("%d", &N);
    while ( N-- ) {
        scanf("%d", &P);
        if ( Delete(L, P)==false )
            printf(" Deletion Error.\n");
        if ( Insert(L, 0, P)==false )
            printf(" Insertion Error: 0 is not in.\n");
    }
    return 0;
}

/* 你的代码将被嵌在这里 */

输入样例：

6
1 2 3 4 5 6
3
6 5 1
2
-1 6
输出样例：

FULL Insertion Error: 6 is not in.
Finding Error: 6 is not in.
5 is at position 0.
1 is at position 4.
POSITION -1 EMPTY Deletion Error.
FULL Insertion Error: 0 is not in.
POSITION 6 EMPTY Deletion Error.
FULL Insertion Error: 0 is not in.

#include 
#include 
#define MAXSIZE 5
#define ERROR -1
typedef enum {false,true} bool;
typedef int ElementType;
typedef int Position;
typedef struct LNode *List;
struct LNode {
    ElementType Data[MAXSIZE];
    Position Last; /* 保存线性表中最后一个元素的位置 */
};
List MakeEmpty(); 
Position Find( List L, ElementType X );
bool Insert( List L, ElementType X, Position P );
bool Delete( List L, Position P );

int main()
{
    List L;
    ElementType X;
    Position P;
    int N;

    L = MakeEmpty();
    scanf("%d", &N);
    while ( N-- ) {
        scanf("%d", &X);
        if ( Insert(L, X, 0)==false )
            printf(" Insertion Error: %d is not in.\n", X);
    }
    scanf("%d", &N);
    while ( N-- ) {
        scanf("%d", &X);
        P = Find(L, X);
        if ( P == ERROR )
            printf("Finding Error: %d is not in.\n", X);
        else
            printf("%d is at position %d.\n", X, P);
    }
    scanf("%d", &N);
    while ( N-- ) {
        scanf("%d", &P);
        if ( Delete(L, P)==false )
            printf(" Deletion Error.\n");
        if ( Insert(L, 0, P)==false )
            printf(" Insertion Error: 0 is not in.\n");
    }
    return 0;
}
List MakeEmpty(){   //置空 
    List L;
    L=(List*)malloc(sizeof(List));
    L->Last=-1;
    return L;
} 
Position Find( List L, ElementType X ){
    int i;
    for(i=0;i<=L->Last;i++){    //查找 
        if(L->Data[i]==X)
        return i;
    }
    return ERROR;
}
bool Insert( List L, ElementType X, Position P ){   
  if( L->Last+1 ==  MAXSIZE ){      //若最后一个元素下标+1为max则顺序表已满 
    printf( "FULL" );
    return false;
  }
  if(  0 > P || P > ( L->Last + 1 )){//插入位置必须大于等于0，或者小于等于Last+1 
    printf( "ILLEGAL POSITION" );
    return false;
  }
  for(int i=L->Last;i>=P;i--){  //从后面开始移动 
        L->Data[i+1]=L->Data[i]; 
  } 
  L->Data[ P ] = X;
  L->Last++;
  return true;
}
bool Delete( List L, Position P ){
    if(P<0||P>L->Last){ //删除位置必须是[0,Last]之间 
        printf("POSITION %d EMPTY",P);
        return false;
    }
    else{
        int i;
        for(i=P;iLast;i++){
            L->Data[i]=L->Data[i+1];
        }
        L->Last--;
        return true;
    }
}

题目链接：

https://pta.patest.cn/pta/test/15/exam/3/question/725