函數名: wherex 
功  能: 返回窗口內水平光標位置 
用  法: int wherex(void); 
程序例:  

#include <conio.h>  

int main(void) 
{ 
   clrscr(); 
   gotoxy(10,10); 
   cprintf("Current location is X: %d  Y: %d\r\n", wherex(), wherey()); 
   getch();  

   return 0; 
} 
  
  
   

函數名: wherey 
功  能: 返回窗口內垂直光標位置 
用  法: int wherey(void); 
程序例:  

#include <conio.h>  

int main(void) 
{ 
   clrscr(); 
   gotoxy(10,10); 
   cprintf("Current location is X: %d  Y: %d\r\n", wherex(), wherey()); 
   getch();  

   return 0; 
} 
  
  
   

函數名: window 
功  能: 定義活動文本模式窗口 
用  法: void window(int left, int top, int right, int bottom); 
程序例:  

#include <conio.h>  

int main(void) 
{  

   window(10,10,40,11); 
   textcolor(BLACK); 
   textbackground(WHITE); 
   cprintf("This is a test\r\n");  

   return 0; 
} 
  
  
   

函數名: write 
功  能: 寫到一文件中 
用  法: int write(int handel, void *buf, int nbyte); 
程序例:  

#include <stdio.h> 
#include <stdlib.h> 
#include <fcntl.h> 
#include <sys\stat.h> 
#include <io.h> 
#include <string.h>  

int main(void) 
{ 
   int handle; 
   char string[40]; 
   int length, res;  

   /* 
    Create a file named "TEST.$$$" in the current directory and write 
    a string to it.  If "TEST.$$$" already exists, it will be overwritten. 
   */  

   if ((handle = open("TEST.$$$", O_WRONLY | O_CREAT | O_TRUNC, 
                         S_IREAD | S_IWRITE)) == -1) 
   { 
      printf("Error opening file.\n"); 
      exit(1); 
   }  

   strcpy(string, "Hello, world!\n"); 
   length = strlen(string);  

   if ((res = write(handle, string, length)) != length) 
   { 
      printf("Error writing to the file.\n"); 
      exit(1); 
   } 
   printf("Wrote %d bytes to the file.\n", res);  

   close(handle); 
   return 0; 
}