#include <stdio.h>

#include <stdlib.h>

​

int main () {

   char *str;

​

   /* Initial memory allocation */

   str = (char *) malloc(15);

   strcpy(str, "cainiaoya");

   printf("String = %s,  Address = %u\n", str, str);

​

   /* Reallocating memory */

   str = (char *) realloc(str, 25);

   strcat(str, ".com");

   printf("String = %s,  Address = %u\n", str, str);

​

   free(str);

​

   return(0);

}