C库函数 - realloc()

#include <stdio.h>

#include <stdlib.h>



int main () {

   char *str;



   /* Initial memory allocation */

   str = (char *) malloc(15);

   strcpy(str, "codingdict");

   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);

}