/*  my_prog.c  */ 
 
#include <stdio.h> 
#include <sys/types.h> 
 
main() { 
char *str; 
 
str=sbrk(0); 
printf("%d \n",str); 
 
str=sbrk(0); 
printf("%d \n",str); 
 
} 
 
/* end of my_prog.c */ 
 
 
My problem is  I get  different values printed for the two printf statements. 
If I continue to do 'sbrk(0)' and print the base address its the same as what 
got printed the second time. 
 
Why is this ?  
Thanks for your help! 
 
cheers, 
Bala.