C语言库函数(W类字母)

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 <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 <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 <conio.h> 

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 <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;
}