语言库函数类字母牛

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;

}

“全球最赚钱银行”的工行 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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