#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>

void *point;

void *memory_alloc(unsigned int size)
{
    //printf("malloc...\n");
    void *ptr;
    ptr=point;
    unsigned int i=0, memsiz;
    while(i!=size)
    {
        memsiz=ptr+i;
        if(memsiz==NULL)
        {
            i++;
        }
        else
        {
            memsiz=ptr+i;
            i++;
        }
        //printf("%p\n", memsiz);
    }
    //printf("malloc end...\n");
    return ptr;
}
void memory_free(void *ptr)
{
    //printf("freeing mem...\n");
    unsigned int i,memsiz;
    if(point!=ptr)
    {
        printf("Invalid pointer!");
        return 1;
    }
    unsigned int size=sizeof(ptr);
    for(i=0;i<=size;i++)
    {
        memsiz=ptr+i;
        memsiz=NULL;
    }
    //printf("freemem end...\n");
}

void memory_init(void *ptr, unsigned int size)
{
    //printf("meminit...\n");
    unsigned int i;
    point=ptr;
    for(i=0;i<=size;i++)
    {
        ptr=ptr+i;
        ptr=NULL;
    }
    //printf("meminit end...\n");

}

int main()
{
    char region[50];
    memory_init(region, 50);

    char* pointer = (char*) memory_alloc(10);
    if (pointer)
        memset(pointer, 0, 10);
    if (pointer)
        memory_free(pointer);

    return 0;
}