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

int main(void){
  int *p;
  int i;
  p=(int *)calloc(5, sizeof(int));
  for(i=0; i<5; i++){p[i]=i*2;}
  p=(int *)realloc(p, 10*sizeof(int));
  for(i=5; i<10; i++){p[i]=i*3;}
  for(i=0; i<10; i++){printf("%5d ", p[i]);}
  printf("\n");  
  memset(p, 0, 3*sizeof(int)); 
    //kirjutab määratud arv baite nullisid
  for(i=0; i<10; i++){printf("%5d ", p[i]);}
  printf("\n");
  memmove(p+5, p+3, 4*sizeof(int));
    //nihutab mälu alates viiendast elemendist alates 
    //kolmandast elemendist oleva mälu peale.
    //Viimane parameeter on baitidearv.
  for(i=0; i<10; i++){printf("%5d ", p[i]);}
  printf("\n");
  
  return 0;
}

/*
    0     2     4     6     8    15    18    21    24    27
    0     0     0     6     8    15    18    21    24    27
    0     0     0     6     8     6     8    15    18    27
*/