数组库编程

#include <stdio.h>
#include <stdlib.h>
#include <memory.h>
#define datatype int

struct array
{
    datatype *pstart;//数组首地址
    int length;//长度
    int sortstat;//有序或者无序 0 无序 1 有序
};

void init(struct array *parr);
void initwithdata(struct array *parr,datatype data);
void initwitharray(struct array *parr,datatype *pdata,int datalength);
void show(struct array *parr);
void addobject(struct array *parr,datatype data);
void addobjects(struct array *parr,datatype *pdata,int datalength);

void main()
{
    struct array mydata;
    int a[10] = {1,2,3,4,5,6,7,8,9,10};
    int b[6] = {11,12,13,14,15,16};
    int c[5] = {17,18,19,20,21};
    initwitharray(&mydata,a,10);
    show(&mydata);
    addobjects(&mydata,b,6);
    show(&mydata);
    addobjects(&mydata,c,5);
    show(&mydata);
}



void init(struct array *parr)
{
    parr->pstart = NULL;
    parr->length = 0;
    parr->sortstat = 0;
}

void initwithdata(struct array *parr,datatype data)
{
    parr->pstart=(datatype *)(sizeof(datatype));
    *(parr->pstart) = data;
    parr->length = 1;
    parr->sortstat = 0;
}

void initwitharray(struct array *parr,datatype *pdata,int datalength)
{
    parr->pstart= (datatype *)malloc(sizeof(datatype)*datalength);
    memcpy(parr->pstart,pdata,sizeof(datatype)*datalength);
    parr->length = datalength;
    parr->sortstat = 0;
}

void show(struct array *parr)
{
    if(parr == NULL || parr->pstart ==  NULL || parr->length == 0)
    {
        printf("没有");
        return;
    }
    else
    {
        printf("\n数组此时状态\n");
        for(int i=0;i<parr->length;i++)
        {
            printf("%4d",parr->pstart[i]);
        }
    }

    printf("\n");
}

void addobject(struct array *parr,datatype data)
{
    if(parr != NULL)
    {
        if(parr->pstart == NULL || parr->length == 0)
        {
            initwithdata(parr,data);
        }
        else
        {
            parr->pstart = (datatype *)realloc(parr->pstart,parr->length*sizeof(datatype)+sizeof(datatype));
            parr->pstart[parr->length] = data;
            parr->length++;
        }
    }
    else
    {
        printf("%s","addobject error");
    }


}

void addobjects(struct array *parr,datatype *pdata,int datalength)
{
    if(parr != NULL)
    {
        if(parr->pstart == NULL || parr->length == 0)
        {
            initwitharray(parr,pdata,datalength);
        }
        else
        {
            parr->pstart = (datatype *)realloc(parr->pstart,parr->length*sizeof(datatype)+datalength*sizeof(datatype));
            memcpy(parr->pstart+parr->length,pdata,datalength*sizeof(datatype));
            parr->length += datalength;
        }
    }
    else
    {
        printf("%s","addobjects error");
    }
    
}