fork(1) download
copy 
  1. #include<stdio.h>
  2. #include<stdlib.h>
  3. #include<unistd.h>
  4. int level=1;
  5. int n;
  6. void create()
  7. {
  8.    if(level==n)
  9.    {
  10.       exit(0);
  11.    }
  12.    printf("current:%d ",getpid());
  13.    printf("Parent:%d ",getppid());
  14.    if(fork()==0)
  15.    {
  16.      level++;
  17.      printf("Left child:%d ",getpid());
  18.      create();
  19.    }
  20.    if(fork()==0)
  21.    {
  22.      level++;
  23.      printf("Right child:%d ",getpid());
  24.      cout<<"\n";
  25.      create();
  26.    }
  27.    exit(0);
  28. }
  29. int main()
  30. {
  31.    scanf("%d",&n);
  32.    create();
  33.    return 0;
  34. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
copy 
Standard input is empty
compilation info 
prog.c: In function ‘create’:
prog.c:24:6: error: ‘cout’ undeclared (first use in this function)
      cout<<"\n";
      ^~~~
prog.c:24:6: note: each undeclared identifier is reported only once for each function it appears in
stdout
copy 
Standard output is empty
https://ideone.com/wdQq8h
language:
C (gcc 8.3)
created:
6 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!