I was tring to make a class that can make array n do all array work same as java but it is giving error in run time

#include<stdarg.h>
#include<stdio.h>
#include<malloc.h>
#include<process.h>
struct Array
{
    unsigned int bytes;
    void * type;
    struct Array *next;
};

class arr
{
    private:
     Array *element;
     Array *index;
     Array *temp;
     unsigned int arr_size;
    public:
     arr(unsigned int,...);
     void enter_element(unsigned int,...);
};


//constructor
arr::arr(unsigned int t,...)
{
    va_list ap;
    int arg;
    temp=index;
    va_start(ap,t);
    while((arg=va_arg(ap,int))!=0)
    {
        index->bytes=t;
        *(int *)index->type=arg;
        index->next=(Array *)0;
        index=index->next;
    }
    va_end(ap);
    index=temp;
    arg=1;
    while(index->next!=(Array *)0)
    {
        arg=arg*(*(int *)index->type);
        index=index->next;
    }
    index=temp;
    arr_size=(unsigned int)arg;
    temp=element;
    while((arg--)>0)
    {
        element->bytes=t;
        element->type=malloc(t*8);
        if(element->type==(void *)0)
            exit(0);
        switch(t)
        {
         case 2 : *(int*)element->type=0;break;
         case 8 : *(double*)element->type=0.00;break;
        }
        element->next=(Array *)0;
        element=element->next;
    }
    element=temp;
}


//method to enter a array
void arr :: enter_element(unsigned int t1,...)
{
    va_list ap;
    temp=element;
    va_start(ap,t1);
    while(element->next!=((Array *)0))
    {
        switch(t1)
        {
            case 2 : *(int *)element->type=va_arg(ap,int);break;
            case 8 : *(double *)element->type=va_arg(ap,double);break;
        }
        element=element->next;
    }
    va_end(ap);
    element=temp;
}
int main()
{
    arr arr1(2,2,3,0);
}