PTA6-2 顺序表操作集 (20分)
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 */
};
各个操作函数函数定义为: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 -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.
AC代码:
List MakeEmpty()
{
List L;
L=(List)malloc(sizeof(struct LNode));
L->Last=-1;
return L;
}
Position Find(List L,ElementType X)
{
Position i;
for(i=0;i<=L->Last;i++)
{
if(L->Data[i]==X)
break;
}
if(i>L->Last)
return ERROR;
else
return i;
}
bool Insert(List L,ElementType X,Position P)
{
int i;
if(L->Last==MAXSIZE-1)//处理顺序表满
{
printf("FULL");
return false;
}
if(P>L->Last+1||P<0)//处理非法位置
{
printf("ILLEGAL POSITION");
return false;
}
for(i=L->Last;i>=P;i--)
{
L->Data[i+1]=L->Data[i];//后移顺序表元素
}
L->Data[P]=X;
L->Last+=1;
return true;
}
bool Delete(List L,Position P)
{
Position i;
if(P<0||P>L->Last)
{
printf("POSITION %d EMPTY",P);
return false;
}
else
{
for(i=P;i<=L->Last;i++)
{
L->Data[i]=L->Data[i+1];
}
L->Last=L->Last-1;
}
return true;
}
来源:CSDN
作者:Soulstrong c
链接:https://blog.csdn.net/qq_45895645/article/details/103644460