$ export A=5
$ ./bin/repeat 2 A
A=5
A=5
$ ./bin/env B=6 ./bin/repeat 1 A
A=5
$ ./bin/env C=10 ./bin/repeat 2 A 3 B 4 C
A=5
A=5
B=
B=
B=
C=10
C=10
C=10
C=10
$ quit