DOC

dup

By April Hunt,2014-08-27 18:39
15 views 0
dup

函数名: dup

     : 复制一个文件句柄

     : #include <io.h>

     int dup(int handle); 程序例:

    #include <string.h>

    #include <stdio.h>

    #include <conio.h>

    #include <io.h>

    void flush(FILE *stream);

    int main(void)

    {

     FILE *fp;

     char msg[] = "This is a test";

     /* create a file */

     fp = fopen("DUMMY.FIL", "w");

     /* write some data to the file */

     fwrite(msg, strlen(msg), 1, fp);

     clrscr();

     printf("Press any key to flush \

     DUMMY.FIL:");

     getch();

     /* flush the data to DUMMY.FIL without

     closing it */

     flush(fp);

     printf("\nFile was flushed, Press any \

     key to quit:");

     getch();

     return 0;

    }

    void flush(FILE *stream)

    {

     int duphandle;

     /* flush TC's internal buffer */

     fflush(stream);

     /* make a duplicate file handle */

     duphandle = dup(fileno(stream));

     /* close the duplicate handle to flush the

     DOS buffer */

     close(duphandle);

    }

     返回

Report this document

For any questions or suggestions please email
cust-service@docsford.com