why does fork program printf execute more time [duplicate]

Answer 1

In general for n forks in this manner will execute the next statements (in this case printf) 2^n times. Here is how:

|
+-fork()----------------------------------+
|                                         |
+-fork()-------------+                    +-fork()-------------+
|                    |                    |                    |
+-fork()---+         +-fork()---+         +-fork()---+         +-fork()---+
|          |         |          |         |          |         |          |
print()    print()   print()    print()   print()    print()   print()    print()