函数名: farfree 
 功  能: 从远堆中释放一块 
 用  法: #include <alloc.h> 
         void farfree(void); 
 程序例: 
#include <stdio.h> 
 #include <alloc.h> 
 #include <string.h> 
 #include <dos.h> 
int main(void) 
 { 
    char far *fptr; 
    char *str = "Hello"; 
   /* allocate memory for the far pointer */ 
    fptr = farcalloc(10, sizeof(char)); 
   /* copy "Hello" into allocated memory */ 
    /* 
       Note: movedata is used because you might be in a small data model, 
       in which case a normal string copy routine can't be used since it 
       assumes the pointer size is near. 
    */ 
    movedata(FP_SEG(str), FP_OFF(str), 
             FP_SEG(fptr), FP_OFF(fptr), 
             strlen(str)); 
   /* display string (note the F modifier) */ 
    printf("Far string is: %Fs\n", fptr); 
   /* free the memory */ 
    farfree(fptr); 
   return 0; 
 }