C语言库函数(W类字母)

王朝c/c++·作者佚名  2008-06-01
窄屏简体版  字體: |||超大  

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;

}

 
 
 
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