4-2 顺序表操作集 (20分) PTA

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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 <stdio.h>#include <stdlib.h>#define MAXSIZE 5#define ERROR -1typedef 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:

61 2 3 4 5 636 5 12-1 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 <stdio.h>#include <stdlib.h>#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(){List Ptrl;Ptrl = (List)malloc(sizeof(struct LNode));Ptrl->Last = -1;return Ptrl; }  Position Find(List L,ElementType X) { int i = 0;  while(i<=L->Last&&L->Data[i] != X) i++; if(i>L->Last) return ERROR; else return i; } bool Insert(List L,ElementType X,Position P) { if(L->Last == MAXSIZE - 1){ printf("FULL"); return false; } else if(P<0||P>(L->Last+1)){               //可以插入到最后  printf("ILLEGAL POSITION"); return false; } else { int i; for(i = L->Last ;i>=P;i--){ L->Data[i+1] = L->Data[i]; } L->Data[P] = X; ++L->Last; return true; }  } bool Delete(List L,Position P) { if(P<1||P>L->Last) printf("POSITION %d EMPTY",P); else { int i; for(i = P;i<=L->Last;i++){ L->Data[i] = L->Data[i+1]; } L->Last--; return true; }  }

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