Thread: Need Help with Count function

Pass "-v" option to gcc and post its output, as in:

Code:

gcc -v

Reading specs from /usr/lib/gcc-lib/i386-linux/2.95.4/specs
gcc version 2.95.4 20011002 (Debian prerelease)

I don't have gcc so I can't help you out further and the vendor-supplied compiler is giving me right results.

Originally Posted by itCbitC

I don't have gcc so I can't help you out further and the vendor-supplied compiler is giving me right results.

Is there a way I can use this vendor supplied compiler?

Could anyone tell me what the compiler is?

You can purchase it from SGI, though I am not sure if it will work for your Debian Linux release ie x86 architecture.
Check out their site for developers or give them a call for more information.
Whatever you do don't end up purchasing a compiler that is not written for your target architecture.

Alright one more thing about this code. I'm trying to get the parent to display the counts and the child to display its pid but when I editted it nothing shows on the screen.

Code:

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int main(void)
{
    pid_t childpid;
    int count[2];
    int fd[2];
    int m;

    pipe(fd);

    if ((childpid = fork()) == -1) {
        perror("fork");
        exit(1);
    }
    else if (childpid == 0) {
        dup2(fd[0], 0);
        read(fd[0], count, sizeof count);
        printf("child process: this is my pid %d\n", getpid());
    }
    else if (childpid > 0) {
        //close(fd[0]);
        dup2(fd[1], 1);
        for (m = 0; m < 10001; m++) {
            if ((m%5) == 0)
                count[0]++;
            if ((m%3) == 0)
                count[1]++;
        }
      printf("child process: no. of multiples of 5 are %d"
            " and those of 3 are %d . The Pid is %d\n", count[0], count[1], getpid());
        
write(fd[1], count, sizeof count);
    }
    return 0;
}

Because output of the parent is going into the pipe to the child process, so it won't be displayed on the terminal. Perhaps all you need is stdin and stdout without pipes.

so you can communicate between processes using stdin and stdout?

Originally Posted by MSkiLLz

so you can communicate between processes using stdin and stdout?

No they can't communicate with each other since there is no connection between them but they can write to stdout whenever scheduled to do so. IIRC we went over this in the first few posts of this thread.