Add alt scripts to 1994/schnitzi

This required an update to the .gitignore file.

1994/schnitzi/.gitignore

@@ -8,6 +8,11 @@ prog.orig
 schnitzi
 schnitzi2
 schnitzi2.c
+schnitzi3
+schnitzi3.c
 schnitzi.alt
 schnitzi.alt2
 schnitzi.orig
+try1.txt
+try2.txt
+try3.txt

1994/schnitzi/Makefile

@@ -39,7 +39,7 @@ include ../../var.mk
 # Common C compiler warnings to silence
 #
 CSILENCE= -Wno-deprecated-declarations -Wno-error -Wno-implicit-function-declaration \
-	-Wno-strict-prototypes
+	-Wno-strict-prototypes -Wno-implicit-int
 
 # Common C compiler warning flags
 #

1994/schnitzi/README.md

@@ -31,12 +31,7 @@ For more detailed information see [1994 schnitzi in bugs.md](/bugs.md#1994-schni
 ## Try:
 
 ```sh
-./schnitzi < /etc/motd 2>/dev/null
-./schnitzi < /etc/passwd 2>/dev/null
-
-./schnitzi < schnitzi.c > schnitzi2.c 2>/dev/null
-make schnitzi2
-./schnitzi2 < README.md
+./try.sh
 ```
 
 
@@ -65,6 +60,13 @@ Use `schnitzi.alt` and `schnitzi.alt2` as you would `schnitzi` above except that
 feeding the source code to it will not work right.
 
 
+### Alternate try:
+
+```sh
+./try.alt.sh
+```
+
+
 ## Judges' remarks:
 
 Try:
@@ -77,6 +79,9 @@ Compare the output of the program with its source.  Sure the output
 is different, but there is more than meets the `diff`'s eye.  Can you
 find out why?
 
+You might also wish to redirect the output to another file,
+compile it and compare how it works to the original code.
+
 
 ## Author's remarks:
 
@@ -92,14 +97,14 @@ line; for instance, for the file 'info', the program
 would be run as follows:
 
 ```sh
-schnitzi < info
+./schnitzi < info
 ```
 
 The program generates interesting results when its source file is
 used as input:
 
 ```sh
-schnitzi < schnitzi.c
+./schnitzi < schnitzi.c
 ```
 
 The result of this command is a program which does the exact same

1994/schnitzi/try.alt.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+#
+# try.alt.sh - demonstrate IOCCC winner 1994/schnitzi alt code
+#
+
+# 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="$CC" alt >/dev/null || exit 1
+
+
+read -r -n 1 -p "Press any key to run: ./schnitzi.alt < README.md (space = next page, q = quit): "
+echo 1>&2
+./schnitzi.alt < README.md | less -rEXF
+echo 1>&2
+
+echo "$ ./schnitzi.alt2 < schnitzi.alt2.c | diff - schnitzi.c" 1>&2
+read -r -n 1 -p "Press any key to continue (space = next page, q = quit): "
+echo 1>&2
+./schnitzi.alt2 < schnitzi.alt2.c | diff - schnitzi.c
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./schnitzi.alt2 < README.md (space = next page, q = quit): "
+echo 1>&2
+./schnitzi.alt2 < README.md
+echo 1>&2

1994/schnitzi/try.sh

@@ -0,0 +1,66 @@
+#!/usr/bin/env bash
+#
+# try.sh - demonstrate IOCCC winner 1994/schnitzi
+#
+
+# 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
+
+
+read -r -n 1 -p "Press any key to run: ./schnitzi < schnitzi.c > schnitzi2.c: "
+echo 1>&2
+./schnitzi < schnitzi.c > schnitzi2.c 2>/dev/null
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: make schnitzi2: "
+echo 1>&2
+make schnitzi2
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./schnitzi2 < schnitzi2.c > schnitzi3.c: "
+echo 1>&2
+./schnitzi2 < schnitzi2.c > schnitzi3.c 2>/dev/null
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: make schnitzi3: "
+echo 1>&2
+make schnitzi3
+echo 1>&2
+
+
+read -r -n 1 -p "Press any key to run: diff3 schnitzi.c schnitzi2.c schnitzi3.c (space = next page, q = quit): "
+echo 1>&2
+diff3 schnitzi.c schnitzi2.c schnitzi3.c | less -rEXF
+echo 1>&2
+
+read -r -n 1 -p "Press any key to show try.txt: "
+echo 1>&2
+cat try.txt
+echo 1>&2
+
+rm -f try1.txt try2.txt try3.txt
+read -r -n 1 -p "Press any key to run: ./schnitzi < try.txt | tee try1.txt (space = next page, q = quit): "
+echo 1>&2
+./schnitzi < try.txt 2>/dev/null | tee try1.txt
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./schnitzi2 < try.txt | tee try2.txt (space = next page, q = quit): "
+echo 1>&2
+./schnitzi2 < try.txt 2>/dev/null | tee try2.txt
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./schnitzi3 < try.txt | tee try3.txt (space = next page, q = quit): "
+echo 1>&2
+./schnitzi3 < try.txt 2>/dev/null | tee try3.txt
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: diff3 try1.txt try2.txt try3.txt: "
+echo 1>&2
+diff3 try1.txt try2.txt try3.txt && echo "All three files are the same!"
+echo 1>&2

1994/schnitzi/try.txt

@@ -0,0 +1 @@
+1994/schnitzi IOCCC winner test file.