Error code in C

Question

I am having error with my code below

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

int main()
{
        int i, status;
        pid_t child;
        child=fork();
        if(child == 0){
        for(i=0; i<10; i++){
            printf("\tChild PID = %d\n", getpid());
            printf("\tChild PPID = %d\n", getppid());
            sleep(1);
        }
        exit(0);
        }
        else{
        for(i=0; i<10; i++){
            printf("Parent PID = %d\n", getpid());
            printf("Parent PPID = %d\n", getppid());
        }
        }
        waitpid(child, &status, 0);
        return 0;
}

I code in GCC(Unix) , and get the following error :

test.c:27:1: error: expected identifier '(' before '}' token

Can someone suggest me any help? Thanks in advance :)

Your example code isn't even 31 lines long, so hard to have an error on line 31 of it. — Joachim Isaksson, Oct 07 '12 at 17:35
exactly: works for me... check if you have some junk after these 27 lines. — Aki Suihkonen, Oct 07 '12 at 17:35
Seems to work on LWS after including ``. http://liveworkspace.org/code/4a51ef7203ae4c0ecf66823859bdf7a7 — chris, Oct 07 '12 at 17:38
@JoachimIsaksson Maybe the error is about the waitpid identifier. — adadeh, Oct 07 '12 at 17:44
@jens maybe line 27, it is just matter of newline on my code — adadeh, Oct 07 '12 at 18:25
Not FAKE. The OpenSuse is in my vmware. which is the source code CAN NOT BE COPY/PASTE into my browser. — adadeh, Oct 07 '12 at 18:42
Yes, it's fake. You typed it in and the syntax error is gone. How on earth shall we help you? By all means, ftp or scp the file from your VM to something real. Everything else is a waste of time for you and us. — Jens, Oct 07 '12 at 20:24

alk · Answer 1 · 2012-10-07T17:56:09.903

2

The man page for waitpid() states:

#include <sys/types.h>
#include <sys/wait.h>

Anyway, the error might due to the usage of pid_t which is defined in sys/types.h.

Using -Wall to turn on all compiler warnings would have pointed one to the missing prototype of waitpid().

Update: This assumes Linux.

edited Oct 07 '12 at 17:56

answered Oct 07 '12 at 17:42

alk

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What man page? Some don't mention `sys/types.h`. – Oct 07 '12 at 17:51
i try gcc -Wall test.c and the output are: test.c: in function 'main': test.c:8:2: warning: implicit declaration of function 'fork' – adadeh Oct 07 '12 at 17:53
@VladLazarenko: `This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.` Please excuse assuming the OP refers to Linux. – alk Oct 07 '12 at 17:54
You might like to check your local man-pages for `fork()` or scan the appropriate header files for which declares it and the other functions (`waitpid()`, `sleep()`) you are using and trhen `#include` such file(s) into your sources. @adadeh – alk Oct 07 '12 at 18:02
@alk searching manually for the headers isnt it? Ok – adadeh Oct 07 '12 at 18:42

Error code in C

1 Answers1