函数名: setblock

功 能: 修改先前已分配的DOS存储段大小

用 法: int setblock(int seg, int newsize);

程序例:

#include <dos.h>

#include <alloc.h>

#include <stdio.h>

#include <stdlib.h>

int main(void)

{

unsigned int size, segp;

int stat;

size = 64; /* (64 x 16) = 1024 bytes */

stat = allocmem(size, &segp);

if (stat == -1)

printf("Allocated memory at segment: %X\", segp);

else

{

printf("Failed: maximum number of paragraphs available is %d\",

stat);

exit(1);

}

stat = setblock(segp, size * 2);

if (stat == -1)

printf("Expanded memory block at segment: %X\", segp);

else

printf("Failed: maximum number of paragraphs available is %d\",

stat);

freemem(segp);

return 0;

}