#define ALLOCSIZE 10000

static char allocbuf[ALLOCSIZE];

static char *allocp = allocbuf;

char *alloc(int n)

{

    if(allocbuf + ALLOCSIZE - allocp >= n){

        allocp += n;

        return allocp - n;

    }else

        return ;

}

void afree(char *p)

{

    if(p >= allocbuf && p < allocbuf + ALLOCSIZE)

        allocp = p;

}

#define ALLOCSIZE

static char allocbuf[ALLOCSIZE];

static char *allocp = allocbuf;

char *alloc(int n)

{

    if(allocbuf + ALLOCSIZE - allocp >= n){

        allocp += n;

        return allocp - n;

    }else

        return ;

}

void afree(char *p)

{

    if(p >= allocbuf && p < allocbuf + ALLOCSIZE)

        allocp = p;

}