线性表顺序存储结构实现

#include<stdio.h>

#define MAXSIZE 20
typedef int ElemType;
typedef struct
{
    ElemType data[MAXSIZE];
    int length;
}SqList;

int get_elem(SqList *L, int i, ElemType *e)
{
    if(L->length==0 || i<1 || i>L->length)
        return 0;
    *e=L->data[i-1];
    return 1;
}

int insert_elem(SqList *L, int i, ElemType e)
{
    int j;
    if (L->length ==0&&i==0){
        L->data[0]=e;
        L->length++;
        return 1;
    }
    if(L->length==MAXSIZE || i<0 || i>L->length)
        return 0;
    for(j=L->length;j>i;j--){
        L->data[j]=L->data[j-1];
    }
    L->data[i]=e;
    L->length++;
    return 1;
}

int delete_elem(SqList *L, int i, ElemType *e)
{
    if(L->length==0|| i<0 || i>L->length-1)
        return 0;
    *e=L->data[i];
    for( ;i<L->length-1;i++)
        L->data[i]=L->data[i+1];
    L->length--;
    return 1;
}

int init_sqlist(SqList *L)
{
    L->length=0;
}

int test_sqlist(SqList *L)
{
    int i=0;
    int data=0;
    int *e;
    
    printf("input the damn data, split by return, end by -1\n");
    do {
        scanf("%d",&data);
        insert_elem(L,i++,data);
    } while (data!=-1);

    printf("the list is:\n");
    print_sqlist(L);


    printf("input the position of the number you will delete:\n");
    scanf("%d",&data);
    delete_elem(L,data,e);
    printf("the number you deleted is %d\n",*e);

    printf("now the list is:\n");
    print_sqlist(L);

    return 1;
}

int print_sqlist(SqList *L)
{
    int j;
    for(j=0;j<L->length-1;j++)
        printf("the %dnd data is %d\n",j,L->data[j]);
    
    return 1;
}

int main()
{
    SqList L1;
    SqList *p;
    p=&L1;
    init_sqlist(p);
    test_sqlist(p);
    return 1;
}

参考《大话数据结构》