Play between 2 Process

one girl · 05-03-2014, 04:59 AM

this game is run by the user ,I need the game run between two process the one guess and the other sleep ,until get the result .I need the answer by use the sleep and weak up.

PHP Code:



#include <stdlib.h> 
#include <stdio.h> 
#include <time.h> 
  
#define GAME_LOWER_LIMIT 0 
#define GAME_UPPER_LIMIT 100 
  
int main(){ 
  int  number; 
    int  done = 0; 
    char line[32]; 
    int  numGuesses = 0; 
 
 
    srand(time(0)); 
    number = GAME_LOWER_LIMIT + rand() % (GAME_UPPER_LIMIT - GAME_LOWER_LIMIT + 1); 
 
 
    while (!done) 
    { 
        printf("Guess a number between %d and %d: ", GAME_LOWER_LIMIT, GAME_UPPER_LIMIT); 
 
 
        if (fgets(line, sizeof(line), stdin) != NULL) 
        { 
            int guess; 
 
 
            if (sscanf(line, "%d", &guess) == 1) 
            { 
                if (number == guess) 
                { 
                    printf( "\nYou guessed correctly after %d times!\n\n", numGuesses); 
                    done = 1; 
                } 
                else 
                { 
                    printf("Your guess was too %s.\nTry again: ", number < guess ? "high" : "low"); 
                    numGuesses++; 
                } 
            } 
            else 
            { 
                printf("\nIllegal input; try again...\n\n"); 
            } 
        } 
        else 
        { 
            printf("\nIllegal input; try again...\n\n"); 
        } 
    } 
 
 
}

one girl · 05-03-2014, 12:53 PM

How I can do it plz help me
the time is paaassing no time

grail · 05-03-2014, 02:17 PM

Quote:

I need the game run between two process the one guess and the other sleep

Please explain this further as currently I do not understand the question?

one girl · 05-03-2014, 02:35 PM

Ok
I will explain

one girl · 05-04-2014, 01:57 AM

ok please can any one solved with the pipes
or give me any hint to help me.

I want the first process guess the answer if it is not correct sleep this process and allow to the second process guess the answer if it right answer terminate the game ,if it is wrong sleep process two and weak up process one to guess the new answer and so as,,,

grail · 05-04-2014, 04:57 AM

Still missing what you mean

Could you explain what you mean by 'first process'? As far as I can see from your code you are not dealing with multiple processes.

one girl · 05-04-2014, 05:12 AM

Yes, actually my teacher for first part of my project asked to do it as the code above ,
But the second part as I described between 2 process using pipes

I know the Question is not easy and the big problem not clear how to do it

Also no one in the class until now, know how to do it
And date time is this week

NevemTeve · 05-04-2014, 05:33 AM

As a start, write the two program, each using their standard input/output, only add an extra feature to write every output to stderr, too, so that you can see what's happening:

Code:

fprintf (stdout, "So you entered %d. It's too small.\n", tryvalue); fflush (stdout);
fprintf (stderr, "So you entered %d. It's too small.\n", tryvalue); fflush (stderr);

when both works, try something like this:

Code:

mknod prg1-to-prg2 p
mknod prg2-to-prg1 p
./prg1 <prg2-to-prg1 >prg1-to-prg2 &
./prg2 <prg1-to-prg2 >prg2-to-prg1 &

NevemTeve · 05-04-2014, 06:00 AM

Or, if you don't want manually duplicate stdout to stderr:

Code:

mknod prg1-to-prg2 p
mknod prg2-to-prg1 p
./prg1 <prg2-to-prg1 | tee prg1-to-prg2 &
./prg2 <prg1-to-prg2 | tee prg2-to-prg1 &

Of course you can (and should) write a main program (in shell or C or other language), that does these redirections:

Code:

$ cat run_both.sh
#!/bin/sh
mknod prg1-to-prg2 p
mknod prg2-to-prg1 p
./prg1 <prg2-to-prg1 | tee prg1-to-prg2 &
./prg2 <prg1-to-prg2 | tee prg2-to-prg1 &
wait

one girl · 05-04-2014, 06:15 AM

ok sorry can you help me to run this game by the computer not by the user. I mean the computer guess the answer until access to the right answer.
i wish understand what I mean.

NevemTeve · 05-04-2014, 08:48 AM

Please write the other program (the one that makes the guesses). (Or hire someone to write it.)

one girl · 05-04-2014, 09:01 AM

If I know how to do it ,
I will do

but really I do know how to start

cin_ · 05-04-2014, 04:04 PM

unsure what you want exactly but if you want two processes to be able to 'communicate' naively you could have the two read and write to a shared file

proc1:
read in file
read in stdin
check stdin against file
react

Code:

#!/bin/bash


while [[ 17 ]]; do  #17 is always 17 so infinite loop
  fi=$(cat .sharedfile)
  echo ..$fi

  read userin

  if [[ $userin == $fi ]]; then
    echo "already in state"
  else
    echo "changed state: $userin"
    echo $userin>.sharedfile
  fi
done

proc2:
infinite while loop
read in file
depending on current file contents either:
react
or, sleep for some finite time(1,3,17 or however many seconds)
loop

Code:

#!/bin/bash

while [[ 17 ]] ; do #17 is always 17 so infinite loop
  fi=$(cat .sharedfile)
  if [[ $fi == "on" ]]; then
      echo "onit"
  else
      echo "."
      $(sleep 1) #sleep for 1second
  fi
done

running the first process..

Code:

# cat .sharedfile
 off
# ./proc1
..off
off
already in state
..off
on
changed state: on

while proc2..

Code:

.
.
.
onit
onit
onit
onit

if proc2 reads the file and decides to sleep, or wait for the file to change, and proc1 alters the shared file while proc2 is sleeping, when the proc2 sleep completes it will check the new state of the file, if it has gone unchanged it will sleep again, if changed it can perform some function that was predicated on a specific state of the shared file

the length of the sleep will be determined by how often a check is necessary and how much CPU usage you are willing to sacrifice for this game