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

main() {
 int i,j;
 char *cph, *cp, *cpg;

 cph = malloc(20);
 strcpy(cph,"hello world");
 printf("%s\n", cph);

 for(i=0;i<6;i++){
   printf("%d...\n",i);
   cp = malloc(1000000000);
   for(j=0;j<1000000000;j++)
     cp[j] = '0' + j;
   free(cp);
 }

 cpg = malloc(20);
 memcpy(cpg,cph,20);
 printf("%s\n", cpg);

 return 0;
}