C语言函数大全

				W类
				
				函数名: wherex 
				功  能: 返回窗口内水平光标位置 
				用  法: int wherex(void); 
				程序例:  
				#include    
				int main(void) 
				{ 
				   clrscr(); 
				   gotoxy(10,10); 
				   cprintf("Current location is X: %d  Y: %d\r\n", wherex(), wherey()); 
				   getch();  
				   return 0; 
				}        
				函数名: wherey 
				功  能: 返回窗口内垂直光标位置 
				用  法: int wherey(void); 
				程序例:  
				#include   
				int main(void) 
				{ 
				   clrscr(); 
				   gotoxy(10,10); 
				   cprintf("Current location is X: %d  Y: %d\r\n", wherex(), wherey()); 
				   getch();  
				   return 0; 
				} 
				函数名: window 
				功  能: 定义活动文本模式窗口 
				用  法: void window(int left, int top, int right, int bottom); 
				程序例:  
				#include   
				int main(void) 
				{  
				   window(10,10,40,11); 
				   textcolor(BLACK); 
				   textbackground(WHITE); 
				   cprintf("This is a test\r\n");  
				   return 0; 
				}        
				函数名: write 
				功  能: 写到一文件中 
				用  法: int write(int handel, void *buf, int nbyte); 
				程序例:  
				#include  
				#include  
				#include  
				#include  
				#include  
				#include   
				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; 
				}