Merge pull request #1789 from xexyl/sicherman85try

1985/sicherman/Makefile

@@ -141,6 +141,8 @@ ${PROG}: ${PROG}.c ${PROG}.alt2.c
 alt: data ${ALT_TARGET}
 	@${TRUE}
 
+${PROG}.alt: ${PROG}.alt.c
+	${CC} ${CFLAGS} -traditional-cpp $< -o $@ ${LDFLAGS}
 
 # data files
 #

1985/sicherman/README.md

@@ -4,13 +4,14 @@
 make all
 ```
 
-NOTE: there is an [alternate version](#alternate-code) for those who have an old
-enough compiler or have a compiler that supports the option `-traditional-cpp`.
-There is also an alternate version that is meant to work in the case that your
-version of clang fails to compile it due to the wrong number of args to `main()`
-should that ever happen (a compiler error of some versions of clang if `main()`
-has four args is that `main()` can only have 0, 2 or 3 args but it does
-currently accept 1 arg to `main()` nonetheless).
+There is an alternate version for those with an old enough compiler or one that
+accepts `-traditional-cpp`. The second alt version will be compiled in the case
+that you have a compiler that does not support 1 arg only in `main()`. For
+instance clang has a number of defects and some versions say that `main()` can
+only have 0, 2 or 3 args. The versions that have this that we know about do
+support 1 arg but in case this is ever changed the
+[sicherman.alt2.c](sicherman.alt2.c) is provided. See [Alternate
+code](#alternate-code) below for details on the alt code, the original entry.
 
 
 ## To use:
@@ -35,8 +36,8 @@ echo IOCCC | ./sicherman
 
 ## Alternate code:
 
-This alternate version, which is the original entry, requires either an old
-enough compiler or a compiler that supports `-traditional-cpp`. If you have such
+The [sicherman.alt.c](sicherman.alt.c) is the original entry and requires either
+an old enough compiler or a compiler that supports `-traditional-cpp`. If you have such
 a compiler you can try this version.
 
 
@@ -44,6 +45,7 @@ a compiler you can try this version.
 
 ```sh
 make alt
+
 ```
 
 

1985/sicherman/try.sh

@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+#
+# try.sh - demonstrate IOCCC winner 1985/sicherman
+#
+
+# 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
+
+
+read -r -n 1 -p "Press any key to run: ./sicherman  < sicherman.c: "
+echo 1>&2
+./sicherman  < sicherman.c
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: echo IOCCC | ./sicherman: "
+echo 1>&2
+echo IOCCC | ./sicherman
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./sicherman < sicherman.c | ./sicherman: "
+echo 1>&2
+./sicherman < sicherman.c | ./sicherman
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./sicherman < sicherman.c | ./sicherman | diff -s - sicherman.c: "
+echo 1>&2
+./sicherman < sicherman.c | ./sicherman | diff -s - sicherman.c

thanks-for-help.md

@@ -304,18 +304,18 @@ case as `c`.
 
 - The code in `main()` is where there are significant changes, changing from:
 
-	    ```c
-	    while (read(0,&__,1) & write((_=(_=C_C_(__),C)),
-	    _C_,1)) _=C-V+subr(&V);
-	    ```
+	```c
+	while (read(0,&__,1) & write((_=(_=C_C_(__),C)),
+	_C_,1)) _=C-V+subr(&V);
+	```
 
-	to:
+    to:
 
-	    ```c
-	    while (read(0,&__,1) & write((_=(_=C_C_(__),
-	    V))?__:__-_+'\b'b'\b'|((_-52)%('\b'b'\b'+~
-	    ' '&'\t'b'\n')+1),1),&_,1))_=c-v+subr(&v));
-	    ```
+	```c
+	while (read(0,&__,1) & write((_=(_=C_C_(__),
+	V))?__:__-_+'\b'b'\b'|((_-52)%('\b'b'\b'+~
+	' '&'\t'b'\n')+1),1),&_,1))_=c-v+subr(&v));
+	```
 
     Note how numerous of the macros (though two changed in case) can still be
     used but some cannot be. Can you figure out why? Why too is it that the
@@ -324,6 +324,12 @@ case as `c`.
     remove it from `main()`? What happens if you remove it from `subr()` or
     don't even bother calling `subr()`?
 
+Additional code was added in case the fix cannot be compiled by some compilers
+should they object to `main()` having only one arg. This version will
+automatically be compiled if the entry fails to compile for some reason.
+
+Cody also added the [try.sh](/1985/sicherman/try.sh) script.
+
 
 # <a name="1986"></a>1986