Fix segfault in 1993/schnitzi + update README.md
If no file was specified or could not be opened the program segfaulted. This has been fixed. Format fixes in README.md.
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@@ -9,22 +9,44 @@
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make all
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make all
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[Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) made this use `fgets()`
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[Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) fixed this to not
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not `gets()` to make it safer. Thank you Cody for your assistance!
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segfault when no file is specified or the file cannot be opened for reading. he
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also made this use `fgets()` not `gets()` to make it safer. Thank you Cody for
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your assistance!
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### To run
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### To run:
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./schnitzi file
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./schnitzi file
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where:
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where:
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file a file containing some text
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file a file containing some text
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## Judges' comments
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## Try:
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After this program prints the contents of 'file', ask it
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./schnitzi schnitzi.info
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some questions related to the text.
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# ask some questions suggested by the author, noted below
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We also suggest you ask the program:
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Who is Mark Schnitzus?
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Notice how it still manages to answer the question despite there being an
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intentional spelling error there.
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Try feeding the program source to the program and ask both:
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What is cat ?
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What is cat?
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## Judges' comments:
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After this program prints the contents of 'file', ask it
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some questions related to the text.
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The author suggests the following questions when using schnitzi.info:
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The author suggests the following questions when using schnitzi.info:
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Who is Mark Schnitzius?
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Who is Mark Schnitzius?
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What exactly does this program do?
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What exactly does this program do?
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@@ -35,65 +57,57 @@ not `gets()` to make it safer. Thank you Cody for your assistance!
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Is it true that Elvis is alive?
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Is it true that Elvis is alive?
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Do colorless green ideas sleep furiously?
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Do colorless green ideas sleep furiously?
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We suggest you try using the body (minus the header and signature line)
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We suggest you try using the body (minus the header and signature line)
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of a Usenet article. You might want to try something from alt.flame. :-)
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of a Usenet article. You might want to try something from alt.flame. :-)
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If you have a ' in the question this entry may fail.
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NOTE: If you have a ' in the question this entry may fail.
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NOTE: This entry uses `gets()` so you might get a warning when compiling and
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NOTE: The author may also be contacted at: marks@aldrin.ksc.nasa.gov.
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running this entry.
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NOTE: this entry will likely segfault if you do not provide it with a data
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## Author's comments:
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file.
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NOTE: The author may also be contacted at: marks@aldrin.ksc.nasa.gov
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I wanted to write a program that would read in a text file in
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natural language (such as English) and answer questions about that
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text file. I thought this might be a complicated task, and I was
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right -- it took me over 800 bytes. Of course, it doesn't always
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work, but that's AI for you.
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## Author's comments
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This program accepts the name of a text file as the first
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parameter. For example, to run it on the supplied data file called
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'info' you would type `./schnitzi info`. It echoes the file, then
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gives you a prompt where you may type in questions about that text.
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The more words you use which are actually present in the text file,
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the better results you get. You'll need to hit `ctrl-c` to break out
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of the program. Just hitting `return` at the prompt will reprint the
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paragraph.
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I wanted to write a program that would read in a text file in
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If you're curious as to how it works, I guess you could feed in the
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natural language (such as English) and answer questions about that
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source as the input file and ask "How does this work?" at the prompt,
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text file. I thought this might be a complicated task, and I was
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but I'm not guaranteeing any results...
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right -- it took me over 800 bytes. Of course, it doesn't always
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work, but that's AI for you.
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This program accepts the name of a text file as the first
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### Compilation notes:
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parameter. For example, to run it on the supplied data file called
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'info' you would type 'schnitzi info'. It echoes the file, then
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gives you a prompt where you may type in questions about that text.
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The more words you use which are actually present in the text file,
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the better results you get. You'll need to hit <ctrl-c> to break out
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of the program. Just hitting <return> at the prompt will reprint the
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paragraph.
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If you're curious as to how it works, I guess you could feed in the
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- The use of 'strcasecmp' may be non-standard. 'strcmp' can be substituted for
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source as the input file and ask "How does this work?" at the prompt,
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it, with a slight performance penalty.
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but I'm not guaranteeing any results...
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Compilation notes:
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- This program depends on the first command-line parameter, typically called
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argv[0], to hold the name of the executable. It is my understanding that this
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property of argv[0] is not guaranteed on some systems.
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o The use of 'strcasecmp' may be non-standard. 'strcmp'
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### Obfuscation:
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can be substituted for it, with a slight performance penalty.
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o This program depends on the first command-line parameter, typically
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- It uses a hidden string to test for punctuation.
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called argv[0], to hold the name of the executable. It is my under-
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standing that this property of argv[0] is not guaranteed on some
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systems.
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This program is obfuscated in the following ways:
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- The layout, variable names, and expression format have been chosen in such a
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way as to cause visual confusion.
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o It uses a hidden string to test for punctuation;
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- It uses uses external 'system' calls to echo the text file and break up the
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question into individual words with a recursive call.
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o The layout, variable names, and expression format
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- It uses a clever hack to simulate artificial intelligence.
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have been chosen in such a way as to cause visual confusion;
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o It uses uses external 'system' calls to echo the text
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The text for the info file, by the way, consists largely of headlines
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file and break up the question into individual words with a
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from the Weekly World News.
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recursive call;
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o It uses a clever hack to simulate artificial intelligence.
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The text for the info file, by the way, consists largely of headlines
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from the Weekly World News.
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## Copyright and CC BY-SA 4.0 License:
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## Copyright and CC BY-SA 4.0 License:
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@@ -13,9 +13,9 @@
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( lll>l1 ) li|=! ( l[3*l1+++3
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( lll>l1 ) li|=! ( l[3*l1+++3
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] -ll[strlen ( ll)-1] ) ;return
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] -ll[strlen ( ll)-1] ) ;return
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( li ) ;}main ( ll,lll
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( li ) ;}main ( ll,lll
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) char*lll[];{char l1 [ 111][21],li1[111][21 ] ,il1[111],i1l
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) char*lll[];{if(ll<2)return 1;char l1 [111][21], li1[111][21],il1[111],i1l
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[ 111 ] ;int lli,l11,l1l,li/* ( */,ll1,il,l;FILE*f;if(ll-2
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[ 111 ] ;int lli,l11,l1l,li/* ( */,ll1,il,l;FILE*f;if(ll-2
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) {f=fopen ( lll[1],"r" ) ;lli=l=ll1=il=!1;while
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) {f=fopen ( lll[1],"r" );if(!f)return 1;lli=l=ll1=il=!1;while
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( fscanf(f,"%s",l1[lli] ) +1){li=ii ( l1[lli],3
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( fscanf(f,"%s",l1[lli] ) +1){li=ii ( l1[lli],3
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) ;iii ( l1[lli] ) ;l1l=l11=!1;while
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) ;iii ( l1[lli] ) ;l1l=l11=!1;while
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( l1l>-ll ) {iii ( lll[-l1l]
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( l1l>-ll ) {iii ( lll[-l1l]
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