改变数据段空间位置

[c]代码库

#include <stdio.h> 
#include <alloc.h> 

int main(void) 
{ 
   printf("Changing allocation with sbrk()\n"); 
   printf("Before sbrk() call: %lu bytes free\n", 
   (unsigned long) coreleft()); 
   sbrk(1000); 
   printf(" After sbrk() call: %lu bytes free\n", 
   (unsigned long) coreleft()); 
   return 0; 
}