fork download
copy 
  1. #include <stdio.h>
  2. #include <unistd.h>
  3. #include <sys/wait.h>
  4.  
  5.  
  6. int main(void)
  7. {
  8.     int ret;
  9.  
  10.     for(int count=0; count < 2; count++) {
  11. 	ret = fork();
  12.         switch(ret) {
  13.             case -1:
  14.                 printf("fork error on pid %d run %d\n", (int)getpid(), count);
  15.                 break;
  16.             case 0:
  17.                 printf("child pid %d run %d says hi!\n", (int)getpid(), count);
  18.                 break;
  19.             default:
  20. 		printf("parent %d created child %d on run %d\n", (int)getpid(), ret, count);
  21.                 break;
  22.         }
  23.         while(wait(0) > 0);
  24.     }
  25.     return 0;
  26. }
  27.  
Success #stdin #stdout 0.01s 2680KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
child pid 7735 run 0 says hi!
child pid 7736 run 1 says hi!
child pid 7735 run 0 says hi!
parent 7735 created child 7736 on run 1
parent 7731 created child 7735 on run 0
child pid 7737 run 1 says hi!
parent 7731 created child 7735 on run 0
parent 7731 created child 7737 on run 1
https://ideone.com/u3BNh
language:
C++ (gcc 8.3)
created:
11 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!