DseWiki: MarkusRechberger/Input

Veränderung (letzte Änderung) (Autor, Normalansicht)

Verändert: 1,9c1

[[Code]
/**************************************************************************
*
* Purpose: To filter some records.
* Demonstrates the 'feof' & 'fgets' statemnts.
* Author: M J Leslie
* Date: 07-Jun-94
*
*************************************************************************/

Input examples from stdin:

Hinzugefügt: 10a3

[[Code]

Verändert: 16c9

while (feof(stdin) == 0)

while (feof(stdin) == 0) /* stdin is defined in stdio and is a FILE* datatype */

Hinzugefügt: 20a14,44

}
}
]

modified using poll()

[[Code]
#include <stdio.h>
#include <stdlib.h>
#include <sys/poll.h>
#include <unistd.h>

main()
{
struct pollfd fds;
char data[80]; /* Record read from the file. */
int retval;
int n;
fds.fd = {STDIN FILENO}?;
fds.events = POLLIN;
fds.revents = 0;
while ((retval=poll(&fds,1,5000))!=-1) // 5000 milliseconds
{
printf("retval: %d revents: %d\n",retval,fds.revents);
if(fds.revents==1){
printf("reading data!\n");
n=read({STDIN FILENO}?, data, 100); /* Read next record */
data[n]=0;
printf("%s",data); /* O/P the record to the screen */
}
if (data[0] == '#') exit; /* filter out the comments */

Input examples from stdin:

#include <stdio.h> main() { char data[80]; /* Record read from the file. */ while (feof(stdin) == 0) /* stdin is defined in stdio and is a FILE* datatype */ { fgets(data, 2, stdin); /* Read next record */ if (data[0] == '#') exit; /* filter out the comments */ printf("%s",data); /* O/P the record to the screen */ } }

modified using poll()

#include <stdio.h> #include <stdlib.h> #include <sys/poll.h> #include <unistd.h> main() { struct pollfd fds; char data[80]; /* Record read from the file. */ int retval; int n; fds.fd = STDIN_FILENO; fds.events = POLLIN; fds.revents = 0; while ((retval=poll(&fds,1,5000))!=-1) // 5000 milliseconds { printf("retval: %d revents: %d\n",retval,fds.revents); if(fds.revents==1){ printf("reading data!\n"); n=read(STDIN_FILENO, data, 100); /* Read next record */ data[n]=0; printf("%s",data); /* O/P the record to the screen */ } if (data[0] == '#') exit; /* filter out the comments */ } }