#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#include <assert.h>
//typedef struct {
//	int a;
//	char b;
//	short c;
//	short d;
//}AA_t;
//int main()
//{
//	printf("%d", sizeof(AA_t));
//	return 0;
//}

//void* memcpy(void* destination, const void* source, size_t num);


////
//void* MyMemcpy(void* s1, const void* s2, size_t num)
//{
//	assert(s1 && s2);
//	void* p = s1;
//	while (num--)
//	{
//		*(char*)s1 = *(char*)s2;
//		s1 = (char*)s1 + 1;
//		s2 = (char*)s2 + 1;
//	}
//	return p;
//}
//
//int main()
//{
//	int arr[] = { 1,2,3,4,5,6,7,8,9,10 };
//	int arr1[5] = { 0 };
//	MyMemcpy(arr+2, arr, 20);
//	/*memcpy(arr + 2, arr, 20);*/
//	return 0;
//}
//




//void* memmove(void* destination, const void* source, size_t num);

void* MyMemmove(void* s1, const void* s2, size_t num)
{
	assert(s1 && s2);
	void* p = s1;
	if (s2 < s1)
		while (num--)
		{
			*((char*)s1 + num) = *((char*)s2 + num);
		}
	else
		while (num--)
		{
			(char*)s1 = (char*)s2;
			s1 = (char*)s1 + 1;
			s2 = (char*)s2 + 1;
		}
	return p;
}



int main()
{
	int arr[10] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
	MyMemmove(arr + 2, arr, 20);
	return 0;
}