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
int main(void)
{
clrscr();
gotoxy(10,10);
cprintf("Current location is X: %d Y: %d
", 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
", 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
");
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.
");
exit(1);
}
strcpy(string, "Hello, world!
");
length = strlen(string);
if ((res = write(handle, string, length)) != length)
{
printf("Error writing to the file.
");
exit(1);
}
printf("Wrote %d bytes to the file.
", res);
close(handle);
return 0;
}
