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  1. #include <stdio.h>
  2. #include <unistd.h>
  3. #include <sys/wait.h>
  4.  
  5. void P0() {
  6.     int  pid1, pid2, pid5;
  7.     pid1 = fork();
  8.     if (pid1 == 0) {
  9.         // Child process P1
  10.         P1();
  11.     } else {
  12.         // Parent process P0
  13.         wait(NULL);
  14.         pid2 = fork();
  15.         if (pid2 == 0) {
  16.             // Child process P2
  17.             P2();
  18.         } else {
  19.             // Parent process P0
  20.             wait(NULL);
  21.             pid5 = fork();
  22.             if (pid5 == 0) {
  23.                 // Child process P5
  24.                 P5();
  25.             } else {
  26.                 // Parent process P0
  27.                 wait(NULL);
  28.                 printf("Process P0 finished.\n");
  29.             }
  30.         }
  31.     }
  32. }
  33.  
  34. void P1() {
  35.     printf("Process P1 started.\n");
  36.     // Code for process P1
  37.     printf("Process P1 finished.\n");
  38. }
  39.  
  40. void P2() {
  41.   int pid3, pid4;
  42.  
  43.     pid3 = fork();
  44.      printf("Process P2 started.\n");
  45.     if (pid3 == 0) {
  46.         // Child process P3
  47.         P3();
  48.     } else {
  49.         // Parent process P2
  50.         wait(NULL);
  51.         pid4 = fork();
  52.         if (pid4 == 0) {
  53.             // Child process P4
  54.             P4();
  55.         } else {
  56.             // Parent process P2
  57.             wait(NULL);
  58.             printf("Process P2 finished.\n");
  59.         }
  60.     }
  61. }
  62.  
  63. void P3() {
  64.     printf("Process P3 started.\n");
  65.     // Code for process P3
  66.     printf("Process P3 finished.\n");
  67. }
  68.  
  69. void P4() {
  70.     printf("Process P4 started.\n");
  71.     // Code for process P4
  72.     printf("Process P4 finished.\n");
  73. }
  74.  
  75. void P5() {
  76.     printf("Process P5 started.\n");
  77.     // Code for process P5
  78.     printf("Process P5 finished.\n");
  79. }
  80.  
  81.  
  82. int main() {
  83.     P0();
  84.     return 0;
  85. }
Success #stdin #stdout 0s 5304KB
comments (?)
stdin 
Standard input is empty
stdout 
Process P1 started.
Process P1 finished.
Process P2 started.
Process P3 started.
Process P3 finished.
Process P2 started.
Process P4 started.
Process P4 finished.
Process P2 started.
Process P2 finished.
Process P5 started.
Process P5 finished.
Process P0 finished.
https://ideone.com/18Mql7
language:
C (gcc 8.3)
created:
16 days ago
visibility:
public

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