Merge pull request #139 from xexyl/1998/schnitzi

Fix segfault in 1998/schnitzi

1998/schnitzi/.gitignore

@@ -1,2 +1,4 @@
 data
 schnitzi
+sort
+sort.c

1998/schnitzi/Makefile

@@ -97,7 +97,7 @@ CDEFINE=
 
 # Include files that are needed to compile
 #
-CINCLUDE=
+CINCLUDE= -include stdlib.h
 #CINCLUDE= -include stdlib.h
 #CINCLUDE= -include stdio.h
 #CINCLUDE= -include stdlib.h -include stdio.h

1998/schnitzi/README.md

@@ -16,6 +16,11 @@
 
 	./schnitzi 5 > sort.c
 	make sort
+
+## Try:
+
+	./schnitzi 3 > sort.c
+	make sort
 	echo 123 > data
 	echo 234 >> data
 	echo 413 >> data
@@ -23,68 +28,78 @@
 	echo 324 >> data
 	./sort < data
 
+[Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) fixed a segfault in
+this entry. The problem was invalid data types. Thank you Cody for your
+assistance!
+
 ## Judges' comments
 
-    This is a beautiful program.  How can a program with no conditional
+This is a beautiful program.  How can a program with no conditional
-    behavior at all have output which depends on anything?
+behavior at all have output which depends on anything?
+
+For hints on deciphering this, see below past the Author's Comments;
+they're a nice summary, but they leave the mystery intact.
+
+BTW: the author notes an incredible lipogram story called
+[Gadsby](https://www.gutenberg.org/cache/epub/47342/pg47342.txt) which has no
+letter E in the story. He did not note this but it has over 50000 (50 thousand)
+(!!) words without the letter E which is one of the most common letters!
 
-    For hints on deciphering this, see below past the Author's Comments;
-    they're a nice summary, but they leave the mystery intact.
 
 ## Author's comments
 
-    In literary circles, there is a poetic form called a "lipogram",
+In literary circles, there is a poetic form called a "lipogram",
-    which is a poem in which a specific letter has been distinctly
+which is a poem in which a specific letter has been distinctly
-    avoided.  This principle can be applied in other ways.  For
+avoided.  This principle can be applied in other ways.  For
-    instance, in this paragraph, the vowel which immediately follows
+instance, in this paragraph, the vowel which immediately follows
-    't' in the alphabet is nowhere to be seen.  There is even an
+'t' in the alphabet is nowhere to be seen.  There is even an
-    entire novel (E. V. Wright's "Gadsby") in which no word contains
+entire novel (E. V. Wright's "Gadsby") in which no word contains
-    the letter 'e'.
+the letter 'e'.
 
-    The IOCCC has been no stranger to this concept.  Several winning
+The IOCCC has been no stranger to this concept.  Several winning
-    entries from years past have accomplished interesting feats while
+entries from years past have accomplished interesting feats while
-    completely avoiding the use of certain C constructs thought to
+completely avoiding the use of certain C constructs thought to
-    be essential (e.g. 1988's robison.c).  If you have to ask why they
+be essential (e.g. 1988's robison.c).  If you have to ask why they
-    would do it this way, then this contest just isn't for you.
+would do it this way, then this contest just isn't for you.
 
-    In continuing with this fine tradition, this program suggests to
+In continuing with this fine tradition, this program suggests to
-    the ANSI committee some new practical simplifications for the C
+the ANSI committee some new practical simplifications for the C
-    language.  For instance, it appears that CONDITIONAL BRANCHING isn't
+language.  For instance, it appears that CONDITIONAL BRANCHING isn't
-    really necessary.  So, we can do away with while, do...while, for,
+really necessary.  So, we can do away with while, do...while, for,
-    if/else, switch, ?:, or anything else that might cause any kind of
+if/else, switch, ?:, or anything else that might cause any kind of
-    nondeterministic jump in the code.  There's too much uncertainty
+nondeterministic jump in the code.  There's too much uncertainty
-    in the world anyway.
+in the world anyway.
 
-    Function parameters and return types just confuse people anyway, so
+Function parameters and return types just confuse people anyway, so
-    get rid of them.  Same with local variables.  In fact, all you really
+get rid of them.  Same with local variables.  In fact, all you really
-    need are assignment statements, and maybe one printf() and one goto.
+need are assignment statements, and maybe one printf() and one goto.
 
-    This style of programming is also ideal for systems with limited
+This style of programming is also ideal for systems with limited
-    memory capacity, since the function call stack never goes beyond
+memory capacity, since the function call stack never goes beyond
-    a depth of one.
+a depth of one.
 
-    So what does it do?  Give it an integer (1 < n < 27) on the command
+So what does it do?  Give it an integer (1 < n < 27) on the command
-    line, such as
+line, such as
 
-    	schnitzi 5
+    	./schnitzi 5
 
-    The output will itself be a lipographic program, one which inputs
+The output will itself be a lipographic program, one which inputs
-    (in this case) five numbers and prints them out sorted.  It sorts
+(in this case) five numbers and prints them out sorted.  It sorts
-    them, however, using only "if/else" statements, without arrays or
+them, however, using only "if/else" statements, without arrays or
-    looping.  To see the resulting program run, redirect the output from
+looping.  To see the resulting program run, redirect the output from
-    "schnitzi" into another file, like this
+"schnitzi" into another file, like this
 
     	schnitzi 4 > sort.c
 
-    and then compile it.
+and then compile it.
 
-Spoilers And Hints:
+### Spoilers And Hints:
 
-    The big key to this program is figuring out what the names of the
+The big key to this program is figuring out what the names of the
-    functions ought to be; a bit of research may allow you to guess at
+functions ought to be; a bit of research may allow you to guess at
-    a few crucial ones.
+a few crucial ones.
 
-    The only function ever called is "O", but "O" is just set to point to
+The only function ever called is "O", but "O" is just set to point to
-    other functions all the time.  Or, almost all the time.
+other functions all the time.  Or, almost all the time.
 
-    So how does 'h' get set, and what to?
+So how does 'h' get set, and what to?

1998/schnitzi/schnitzi.c

@@ -1,8 +1,8 @@
 typedef void e();
 
-e *w,*l,*u,*_o,*j,*t,*O,exit,b,c_,b_,a_,c,a,z_,x_,d,y_,_m;
+e *w,*l,*u,*_o,*j,*t,*O,b,c_,b_,a_,c,a,z_,x_,d,y_,_m,n,*h;
-int q,m,_d,z,k,h,f[99];
+int q,m,z,k,f[99];
-char y[26],_p[40][26],_q,r[2],*_,**s,*i,
+char y[26],_p[40][26],_q,r[2],*_,**s,*i,*_d,
 
 *x[]= { "\n", ")", "if (", "}\n", ");\n\n", "    ", ",&", "\"",
   ",", " %%d", ";\n\n    scanf(\"%%d", "%%d ", "else ", ",", "<",
@@ -52,5 +52,5 @@ void x_(){ O=g; *r=y[k-2]; _=r; j=o_; }
 void d (){ O=g; *r=y[k]; _=r; k=k+1; m=k<z; w=_t; l=p_; j=p; }
 void y_(){ O=g; *r=x[17][1]+k; _=r; j=q_; }
 void r_(){ O=_b; _=x[17]; s=(char**)_d; s=s+1; i=*s; q=0; }
-main(int v,char **c){ O=r_; _d=c;
+main(int v,char **V){ O=r_; _d=V;
   x: (O)(); goto x; }

bugs.md

@@ -315,6 +315,27 @@ type).
 
 # 1998
 
+## [1998/schnitzi](1998/schnitzi/schnitzi.c) ([README.md](1998/schnitzi/README.md))
+
+### Status: INABIAF - please do not fix
+
+If you get the compiler warning:
+
+	warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
+	   11 | void  g(){ O=j; printf(_); }
+	      |                 ^~~~~~
+
+
+please do NOT change it! Doing so will break the generated output.
+
+Another warning to ignore is:
+
+
+	warning: assignment to 'char *' from incompatible pointer type 'char **' [-Wincompatible-pointer-types]
+	   55 | main(int v,char **c){ O=r_; _d=c;
+	      |                               ^
+
+Please do not change this either.
 
 # 2000