c语言库函数大全之二(w开头)

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;
}

struct xfcb {

char xfcb_flag; /* Contains 0xff to indicate xfcb */

char xfcb_resv[5]; /* Reserved for DOS */

char xfcb_attr; /* Search attribute */

struct fcb xfcb_fcb; /* The standard fcb */

};