C語言函數大全(w開頭)

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
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
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
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
#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 */
};