Add 1994/tvr try scripts

There are four scripts:

    try.color.sh	# original entry colour mode
    try.bw.sh		# original entry black and white mode
    try.alt.color.sh	# alt code colour mode
    try.alt.bw.sh	# alt code black and white mode

1994/tvr/README.md

@@ -26,16 +26,16 @@ For more detailed information see [1994 tvr in bugs.md](/bugs.md#1994-tvr).
 ./tvr mode screensize/2 < colormapfile
 ```
 
+Mode may be a value from 0 to 12.
+
 
 ## Try:
 
 ```sh
-./tvr 0 128 < tvr.color		(for color displays)
-./tvr 0 128 < tvr.bw		(for Black & White displays)
+./try.color.sh			# for colour displays
+./try.bw.sh			# for Black & White displays
 ```
 
-Mode may be a value from 0 to 12.
-
 
 ## Alternate code:
 
@@ -59,6 +59,14 @@ where `altmode` `1` - `4` correspond to mode `0` - `3` in the original entry and
 `altmode 0` calculates Mandelbrot/Julian sets correctly.
 
 
+## Alternate try:
+
+```sh
+./try.alt.color.sh			# for colour displays
+./try.alt.bw.sh			# for Black & White displays
+```
+
+
 ## Judges' remarks:
 
 This entry requires the use of X11.  It will form two windows (hopefully your

1994/tvr/try.alt.bw.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+#
+# try.alt.bw.sh - demonstrate IOCCC winner 1994/tvr alt code B&W mode
+#
+
+# 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" alt >/dev/null || exit 1
+
+for mode in $(seq 0 4); do
+    for size in 128 256; do
+	read -r -n 1 -p "Press any key to run: ./tvr.alt $mode $size < tvr.bw (q = quit, s = skip): "
+	echo 1>&2
+	if [[ "$REPLY" == "q" || "$REPLY" == "Q" ]]; then
+	    exit 0
+	elif [[ "$REPLY" == "s" || "$REPLY" == "S" ]]; then
+	    continue
+	fi
+	echo 1>&2
+	./tvr.alt "$mode" "$size" < tvr.bw
+	echo 1>&2
+    done
+done

1994/tvr/try.alt.color.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+#
+# try.color.sh - demonstrate IOCCC winner 1994/tvr alt code colour mode
+#
+
+# 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" alt >/dev/null || exit 1
+
+for mode in $(seq 0 4); do
+    for size in 128 256; do
+	read -r -n 1 -p "Press any key to run: ./tvr.alt $mode $size < tvr.color (q = quit, s = skip): "
+	echo 1>&2
+	if [[ "$REPLY" == "q" || "$REPLY" == "Q" ]]; then
+	    exit 0
+	elif [[ "$REPLY" == "s" || "$REPLY" == "S" ]]; then
+	    continue
+	fi
+	echo 1>&2
+	./tvr.alt "$mode" "$size" < tvr.color
+	echo 1>&2
+    done
+done

1994/tvr/try.bw.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+#
+# try.bw.sh - demonstrate IOCCC winner 1994/tvr B&W mode
+#
+
+# 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
+
+for mode in $(seq 0 12); do
+    for size in 128 256; do
+	read -r -n 1 -p "Press any key to run: ./tvr $mode $size < tvr.bw (q = quit, s = skip): "
+	echo 1>&2
+	if [[ "$REPLY" == "q" || "$REPLY" == "Q" ]]; then
+	    exit 0
+	elif [[ "$REPLY" == "s" || "$REPLY" == "S" ]]; then
+	    continue
+	fi
+	echo 1>&2
+	./tvr "$mode" "$size" < tvr.bw
+	echo 1>&2
+    done
+done

1994/tvr/try.color.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+#
+# try.color.sh - demonstrate IOCCC winner 1994/tvr colour mode
+#
+
+# 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
+
+for mode in $(seq 0 12); do
+    for size in 128 256; do
+	read -r -n 1 -p "Press any key to run: ./tvr $mode $size < tvr.color (q = quit, s = skip): "
+	echo 1>&2
+	if [[ "$REPLY" == "q" || "$REPLY" == "Q" ]]; then
+	    exit 0
+	elif [[ "$REPLY" == "s" || "$REPLY" == "S" ]]; then
+	    continue
+	fi
+	echo 1>&2
+	./tvr "$mode" "$size" < tvr.color
+	echo 1>&2
+    done
+done