шифр скиталы

#include "stdafx.h"	
#include <stdio.h>
#include <Windows.h>
void Vvod(char **arr,int &d,int &size)

{
int i=0;
while(i != EOF)
{
			scanf_s( "%c", &arr[i]);	
i++;
}
}

void Shifrovka(char **arr, int &d, int &size)
{
	for (int i = 0; i < size; i++)
	{
		for (int j = 0; j < d; j++)
		{
			printf("%c", arr[i][j]);
		}
	}
}
void Deshifrovka(char **arr, int &d, int &size)
{
	for (int i = 0; i < size; i++)
	{
		for (int j = 0; j < d; j++)
		{
			printf("%c", arr[i][j]);
			if ((i%size == 0) || (i%size == 1) || (i%size == 2) || (i%size == 3))
			{
				printf("\n");
			}
		}
	}
}

int main()
{
printf("vvedite clych");
printf("\n");
int size;
int d;
scanf_s("%d",&d);
printf("\n");
printf("vvedite dlinnu palki");
printf("\n");
scanf_s("%d",&size);
printf("\n");
char **arr;
arr = (char **)malloc((d*size) * sizeof(int));
	Vvod(arr,d,size);
	Shifrovka(arr, d, size);
	Deshifrovka(arr, d, size);
}