函数名: brk

功 能: 改变数据段空间分配

用 法: int brk(void *endds);

头文件：#include<stdlib.h>

程序例:

#include <stdio.h>

#include <alloc.h>

int main(void)

{

char *ptr;

printf("Changing allocation with brk()\");

ptr = malloc(1);

printf("Before brk() call: %lu bytes free\", coreleft());

brk(ptr+1000);

printf(" After brk() call: %lu bytes free\", coreleft());

return 0;

}