From a438eb468f9847ab98017ce5a5ab2e8bd21423de Mon Sep 17 00:00:00 2001
From: Cody Boone Ferguson <53008573+xexyl@users.noreply.github.com>
Date: Tue, 16 Jan 2024 05:57:13 -0800
Subject: [PATCH] Add 1994/imc/try.sh + inclusion of unistd.h

The inclusion of unistd.h is for getpid(2). While not strictly necessary
(at least not observed) this type of thing can be a problem and in some
other entries a missing or incorrect prototype caused the entry to fail
(sometimes only some systems namely macOS). This was just noticed by
chance and I did it on a whim.
---
 1994/imc/Makefile  |  3 +--
 1994/imc/README.md |  7 +------
 1994/imc/imc.c     |  1 +
 1994/imc/try.sh    | 42 ++++++++++++++++++++++++++++++++++++++++++
 thanks-for-help.md | 10 ++++++++++
 5 files changed, 55 insertions(+), 8 deletions(-)
 create mode 100755 1994/imc/try.sh

diff --git a/1994/imc/Makefile b/1994/imc/Makefile
index 38c4d76a5..8e31f7f7f 100644
--- a/1994/imc/Makefile
+++ b/1994/imc/Makefile
@@ -38,8 +38,7 @@ include ../../var.mk
 
 # Common C compiler warnings to silence
 #
-CSILENCE= -Wno-error -Wno-implicit-function-declaration \
-	-Wno-deprecated-non-prototype -Wno-strict-prototypes
+CSILENCE= -Wno-error -Wno-deprecated-non-prototype -Wno-strict-prototypes
 
 # Common C compiler warning flags
 #
diff --git a/1994/imc/README.md b/1994/imc/README.md
index 7d3192474..cfa4090f8 100644
--- a/1994/imc/README.md
+++ b/1994/imc/README.md
@@ -17,12 +17,7 @@ where `[NUMBER]` is an optional number. Default is 5.
 ## Try:
 
 ```sh
-./imc 3
-./imc 3
-./imc 4
-./imc 4
-./imc 6
-./imc 13
+./try.sh
 ```
 
 
diff --git a/1994/imc/imc.c b/1994/imc/imc.c
index 8cde6fe74..6323cf426 100644
--- a/1994/imc/imc.c
+++ b/1994/imc/imc.c
@@ -1,5 +1,6 @@
 #include<stdio.h>
 #include<stdlib.h>
+#include<unistd.h>
 #define f (sizeof(int))
 
 int i,j,k,l,m,*t,*u,*v;
diff --git a/1994/imc/try.sh b/1994/imc/try.sh
new file mode 100755
index 000000000..1a0780745
--- /dev/null
+++ b/1994/imc/try.sh
@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+#
+# try.sh - demonstrate IOCCC winner 1994/imc
+#
+
+# 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="$CC" all >/dev/null || exit 1
+
+imc()
+{
+    if [[ "$#" != 1 ]]; then
+	echo "$0: imc() expects 1, arg got: $#" 1>&2
+	return
+    fi
+
+    read -r -n 1 -p "Press any key to run: ./imc $1: "
+    echo 1>&2
+    ./imc "$1"
+    echo 1>&2
+
+    # Notice how we run the program with the same arg as above. This is because it
+    # will not show the same output as it is randomised.
+    read -r -n 1 -p "Press any key to run: ./imc $1: "
+    echo 1>&2
+    ./imc "$1"
+    echo 1>&2
+}
+
+# clear screen after compilation so that only the entry is shown
+clear
+
+imc 3
+imc 4
+imc 6
+imc 13
+imc 15
diff --git a/thanks-for-help.md b/thanks-for-help.md
index 3b4a03104..3b97574ae 100644
--- a/thanks-for-help.md
+++ b/thanks-for-help.md
@@ -1890,6 +1890,16 @@ newsletter was found on the Internet Wayback Machine and the article was
 extracted as a PDF in the macOS `Preview.app` (`File -> Print` feature).
 
 
+## <a name="1994_imc"></a>[1994/imc](/1994/imc/imc.c) ([README.md](/1994/imc/README.md]))
+
+[Cody](#cody) added the [try.sh](/1994/imc/try.sh) script.
+
+Cody also added inclusion of `unistd.h` for `getpid(2)`. While strictly speaking
+this was not necessary (in multiple systems) it can sometimes be a problem and
+as it was noticed it was changed (the only case this was done except in the
+entries that actually did not work because of missing or incorrect prototypes).
+
+
 ## <a name="1994_ldb"></a>[1994/ldb](/1994/ldb/ldb.c) ([README.md](/1994/ldb/README.md]))
 
 [Cody](#cody) fixed this so it would compile and work with modern compilers. The problem