c primer plus Chapter 16 After-Class Programming 5 Questions

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

#define MAX 1000
#define RANDOM_M 21

int main (void)
{
int number1 [MAX];
int number_p [RANDOM_M];
int j, i;
srand ((unsigned int) time (0)); // Initial seed

for(i=0;i<MAX;i++)
    number1[i]= rand() % 32768;
memmove(number_p,number1,sizeof(int)*(RANDOM_M));
number_p[20]='\0';
for(j=0;j<(RANDOM_M-1);j++)
{
    if(j%10==0)
        printf("\n");
    printf("%8d",number_p[j]);
}
printf("\n");

return 0;

}