#define HELLO printf("hello\n") void doit () { } if (fork()==0) { fork(); HELLO; return; } HELLO; return; int main() { doit (); HELLO; return 0; } a. Assume no call to fork () fails. How many times does the above program print "hello"? b. Does that answer change if == is changed to != in the doit () function? c. Draw a process graph showing the evolution of this program.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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#define HELLO printf("hello\n")
void doit () {
}
if (fork()==0) {
fork();
HELLO;
return;
}
HELLO;
return;
int main() {
doit ();
HELLO;
return 0;
}
a. Assume no call to fork () fails. How many times does the above program print “hello”?
b. Does that answer change if
==
is changed to != in the doit () function?
c. Draw a process graph showing the evolution of this program.
Transcribed Image Text:#define HELLO printf("hello\n") void doit () { } if (fork()==0) { fork(); HELLO; return; } HELLO; return; int main() { doit (); HELLO; return 0; } a. Assume no call to fork () fails. How many times does the above program print “hello”? b. Does that answer change if == is changed to != in the doit () function? c. Draw a process graph showing the evolution of this program.
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