Add 1994/weisberg/try.sh and primes.sh

The primes.sh script is like 1985/august/primes.sh but it only acts on
reversed output (if rev(1) is installed) of the weisberg because
weisberg actually prints out primes so there's no point doing it without
reversing it. One can specify the number of lines to reverse (not how
many primes to show) by passing an arg to the script. The try.sh script
uses the default (15) and also 25.

1994/weisberg/try.sh

@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+#
+# try.sh - demonstrate IOCCC winner 1994/weisberg
+#
+
+# make sure CC is set so that when we do make CC="$CC" it isn't empty. Doing it
+# this way allows us to have the user specify a different compiler in an easy
+# way.
+if [[ -z "$CC" ]]; then
+    CC="cc"
+fi
+
+make CC="$CC" all >/dev/null || exit 1
+
+# clear screen after compilation so that only the entry is shown
+clear
+
+REV="$(type -P rev)"
+
+read -r -n 1 -p "Press any key to run: ./weisberg | head -n 15: "
+echo 1>&2
+./weisberg | head -n 15
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./weisberg | head -n 42 (space = next page, q = quit): "
+echo 1>&2
+./weisberg | head -n 42 | less -rEXF
+echo 1>&2
+
+if [[ -n "$REV" ]]; then
+    echo 1>&2
+    read -r -n 1 -p "Press any key to reverse ./weisberg | head -n 15: "
+    echo 1>&2
+    ./weisberg | head -n 15 | "$REV"
+
+    read -r -n 1 -p "Press any key to reverse: ./weisberg | head -n 42 (space = next page, q = quit): "
+    echo 1>&2
+    ./weisberg | head -n 42 | "$REV" | less -rEXF
+    echo 1>&2
+fi
+
+# run primes.sh too
+echo 1>&2
+read -r -n 1 -p "Press any key to run: ./primes.sh: "
+echo 1>&2
+./primes.sh
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./primes.sh 25: "
+echo 1>&2
+./primes.sh 25
+echo 1>&2
+exit 0