1sub foo { 2 print "in sub foo\n"; 3 exit(0); 4 bar(); 5} 6 7sub bar { 8 print "in sub bar\n"; 9} 10 11sub baz { 12 print "in sub baz\n"; 13 bar(); 14 foo(); 15} 16 17bar(); 18baz(); 19foo(); 20