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  1. #include <stdio.h>
  2. #include <sys/types.h>
  3. #include <unistd.h>
  4. #include <stdlib.h>
  5. #include <sys/wait.h>
  6.  
  7. int main()
  8. {
  9.   int pipe_fd[2];
  10.   pid_t pid1 ;
  11.  
  12.   if (pipe(pipe_fd)==-1)
  13.   {
  14.     printf("error");
  15.     return 1;
  16.  
  17.   }
  18.  
  19.   pid1 = fork();
  20.   if (pid1==-1)
  21.   {
  22.     printf("error creating child process");
  23.   }
  24.  
  25.   else if(pid1==0)
  26.   {
  27.     close(pipe_fd[0]);
  28.     int x;
  29.     printf("enter a input number : ");
  30.     scanf("%d",&x);
  31.     write(pipe_fd[1] , &x , sizeof(int));
  32.     close(pipe_fd[1]);
  33.   }
  34.  
  35.   else
  36.   {
  37.     close(pipe_fd[1]);
  38.     int y;
  39.  
  40.     read(pipe_fd[0] , &y , sizeof(int));
  41.     close(pipe_fd[0]);
  42.     printf("copied value from child process : %d " , y);
  43.  
  44.     //wait(NULL);
  45.  
  46.   }
  47.  
  48.  
  49.  
  50.     return 0;
  51. }
Success #stdin #stdout 0s 5284KB
comments (?)
stdin
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Standard input is empty
stdout
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enter a input number : copied value from child process : 0
https://ideone.com/OPMu2s
language:
C (gcc 8.3)
created:
26 days ago
visibility:
public

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