plz send me the solution of the problem.

Discussion in 'C Programming' started by wahid, Jan 9, 2010.

  1. wahid

    wahid Guest

    Write a program that will have an integer
    number input, and show the digits seperately.
    (Assume that no number with more than 3
    digits will be present in the input)

    like :
    • Enter a Number: 942
    • The first digit of the number is : 9
    • The second digit of the number is : 4
    • The third digit of the number is : 2
     
    wahid, Jan 9, 2010
    #1
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  2. wahid

    Doug Miller Guest

    In article <>, wahid <> wrote:
    >Write a program that will have an integer
    >number input, and show the digits seperately.
    >(Assume that no number with more than 3
    >digits will be present in the input)
    >
    >like :
    >=95 Enter a Number: 942
    >=95 The first digit of the number is : 9
    >=95 The second digit of the number is : 4
    >=95 The third digit of the number is : 2


    Please post your professor's email address so we can send the program directly
    to him.

    Or do your own fucking homework.
     
    Doug Miller, Jan 9, 2010
    #2
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  3. wahid

    Chad Guest

    On Jan 9, 9:39 am, (Doug Miller) wrote:
    > In article <..com>, wahid <> wrote:
    >
    > >Write a program that will have an integer
    > >number input, and show the digits seperately.
    > >(Assume that no number with more than 3
    > >digits will be present in the input)

    >
    > >like :
    > >=95 Enter a Number: 942
    > >=95 The first digit of the number is : 9
    > >=95 The second digit of the number is : 4
    > >=95 The third digit of the number is : 2

    >
    > Please post your professor's email address so we can send the program directly
    > to him.
    >
    > Or do your own fucking homework.


    Okay, it took me an entire 45 seconds to come up with a solution. What
    do I win?
     
    Chad, Jan 9, 2010
    #3
  4. wahid

    osmium Guest

    wahid wrote:

    > Write a program that will have an integer
    > number input, and show the digits seperately.
    > (Assume that no number with more than 3
    > digits will be present in the input)
    >
    > like :
    > • Enter a Number: 942
    > • The first digit of the number is : 9
    > • The second digit of the number is : 4
    > • The third digit of the number is : 2


    In elemntary school you learned how to divide integers and then later on you
    discovered the wonders of "long division"; with integers, C follows the
    rules from the earlier years. Use that hint to write your program.
     
    osmium, Jan 9, 2010
    #4
  5. wahid

    Eric Sosman Guest

    On 1/9/2010 12:29 PM, wahid wrote:
    > Write a program that will have an integer
    > number input, and show the digits seperately.
    > (Assume that no number with more than 3
    > digits will be present in the input)
    >
    > like :
    > • Enter a Number: 942
    > • The first digit of the number is : 9
    > • The second digit of the number is : 4
    > • The third digit of the number is : 2


    #include <stdio.h>
    #include <stdlib.h>
    int main(void) {
    const char *fmt = "The first digit of the number is : %d\n"
    "The second digit of the number is : %d\n"
    "The third digit of the number is : %d\n";
    int number;
    if (scanf("%d", &number) != 1)
    return EXIT_FAILURE;
    switch (number) {
    case 0: printf(fmt, 0, 0, 0); break;
    case 1: printf(fmt, 0, 0, 1); break;
    /* ... left as an exercise for the student ... */
    case 999: printf(fmt, 9, 9, 9); break;
    default: return EXIT_FAILURE;
    }
    return EXIT_SUCCESS;
    }

    Note: A C90 compiler might reject this program on the grounds
    that it has too many case labels. The C99 Standard raised the
    limit, and will not reject it for that reason. Try to find a C99-
    conforming compiler, just for safety's sake.

    --
    Eric Sosman
    lid
     
    Eric Sosman, Jan 9, 2010
    #5
  6. On 9 Jan 2010 at 17:29, wahid wrote:
    > like :
    > • Enter a Number: 942
    > • The first digit of the number is : 9
    > • The second digit of the number is : 4
    > • The third digit of the number is : 2


    #include <stdio.h>

    #define S1 "The "
    #define S2 " digit of the number is : %d\n"

    int main(void)
    {
    int d, rv = 0;
    fputs("Enter a Number: ", stdout);
    fflush(stdout);
    if(scanf("%d", &d) == 1 && d >=0 && d <= 999)
    printf(S1 "first" S2 S1 "second" S2 S1 "third" S2, d/100, d%100/10, d%10);
    else {
    fputs("Invalid input: needed a non-negative integer with <= 3 digits\n",
    stderr);
    rv = 1;
    }
    return rv;
    }
     
    Antoninus Twink, Jan 9, 2010
    #6
  7. wahid

    Seebs Guest

    On 2010-01-09, wahid <> wrote:
    > Write a program that will have an integer
    > number input, and show the digits seperately.
    > (Assume that no number with more than 3
    > digits will be present in the input)


    > like :
    > ? Enter a Number: 942
    > ? The first digit of the number is : 9
    > ? The second digit of the number is : 4
    > ? The third digit of the number is : 2


    I'm surprised you're getting this as homework. It's surprisingly
    difficult for homework to assign to someone who apparently has never
    made any effor towards learning C. Anyway, here's something
    you might try:

    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    #include <time.h>
    #include <limits.h>
    #include <stddef.h>
    #include <math.h>

    struct {
    double lo, close;
    int d;
    } digits[] = {
    { 6.80183905339058814121, 6.80239476332431092231, '\x39' },
    { 6.68398653227400885157, 6.68461172766792710576, '\x38' },
    { 6.55036579410553621017, 6.55108033504340436792, '\x37' },
    { 6.39609597446756872330, 6.39692965521614631541, '\x36' },
    { 6.21360759808860851905, 6.21460809842219141785, '\x35' },
    { 5.99021376520632919949, 5.99146454710798170851, '\x34' },
    { 5.70211441755550385579, 5.70378247465620091816, '\x33' },
    { 5.29581423632991832307, 5.29831736654803631126, '\x32' },
    { 4.60015764416454686625, 4.60517018598809180219, '\x31' },
    { 9, 9, '\x30' },
    { 4.49423862528080952927, 4.49980967033026502122, '\x39' },
    { 4.37575702166028612794, 4.38202663467388120466, '\x38' },
    { 4.24132675257074609476, 4.24849524204935935501, '\x37' },
    { 4.08597631255158422192, 4.09434456222210041432, '\x36' },
    { 3.90197266957464483639, 3.91202300542814596085, '\x35' },
    { 3.67630067190707610081, 3.68887945411393625150, '\x34' },
    { 3.38439026334577430788, 3.40119738166215546116, '\x33' },
    { 2.97041446556970090143, 2.99573227355399085425, '\x32' },
    { 2.25129179860649530909, 2.30258509299404590109, '\x31' },
    { 9, 9, '\x30' },
    { 2.14006616349627076801, 2.19722457733621956422, '\x39' },
    { 2.01490302054226466666, 2.07944154167983574766, '\x38' },
    { 1.87180217690159134136, 1.94591014905531323187, '\x37' },
    { 1.70474809223842527217, 1.79175946922805495731, '\x36' },
    { 1.50407739677627416697, 1.60943791243410028180, '\x35' },
    { 1.25276296849536805667, 1.38629436111989057245, '\x34' },
    { 0.91629073187415510660, 1.09861228866810978211, '\x33' },
    { 0.40546510810816438486, 0.69314718055994528623, '\x32' },
    { -0.69314718055994528623, 0.00000000000000000000, '\x31' },
    { 9, 9, '\x30' },
    { NAN, NAN, '\x00' }
    };

    char *names[] = { "first", "second", "third", "oops", "shit", 0 };

    int
    main(void) {
    int n;
    double d;
    int i;
    int hit = 0;
    int di = 0;
    printf("Enter a Number: ");
    fflush(stdout);
    if (scanf("%d", &n) != 1) {
    fprintf(stderr, "Shyeah right.\n");
    exit(EXIT_FAILURE);
    }
    d = sqrt(n);
    if (d != d) {
    fprintf(stderr, "**** you too buddy.\n");
    exit(EXIT_FAILURE);
    }
    if ((d = log(n)) > 6.9068) {
    fprintf(stderr, "Yeah, well, your mama.\n");
    exit(EXIT_FAILURE);
    }

    for (i = (d >= 0 ? 0 : (hit = 1, 20)); digits.lo == digits.lo; ++i) {
    if (d > digits.lo) {
    printf("The %s digit of the number is %c.\n",
    names[di++], digits.d);
    d = log(exp(d) - exp(digits.close));
    hit = 2;
    }
    if (digits.lo == 9) {
    if (hit == 1) {
    printf("The %s digit of the number is %c.\n",
    names[di++], digits.d);
    }
    if (hit) {
    hit = 1;
    }
    }
    }
    return 0;
    }

    .... cut here...

    Hope this helps!

    -s
    --
    Copyright 2010, all wrongs reversed. Peter Seebach /
    http://www.seebs.net/log/ <-- lawsuits, religion, and funny pictures
    http://en.wikipedia.org/wiki/Fair_Game_(Scientology) <-- get educated!
     
    Seebs, Jan 9, 2010
    #7
  8. wahid

    sfuerst Guest

    On Jan 9, 10:23 am, "osmium" <> wrote:
    > wahid wrote:
    > > Write a program that will have an integer
    > > number input, and show the digits seperately.
    > > (Assume that no number with more than 3
    > > digits will be present in the input)

    >
    > > like :
    > > • Enter a Number: 942
    > > • The first digit of the number is : 9
    > > • The second digit of the number is : 4
    > > • The third digit of the number is : 2

    >
    > In elemntary school you learned how to divide integers and then later on you
    > discovered the wonders of "long division"; with integers, C follows the
    > rules from the earlier years.  Use that hint to write your program.


    Division? Who needs that?

    #include <stdio.h>

    int main(void)
    {
    unsigned n, x, y, m = 429496729;
    char t[] = {48, 49, 50, 50, 51, 51, 52, 53, 53, 54, 55, 55, 56, 56,
    57, 48, 23, 59, 41};
    char *p = 16 + t;

    printf("Enter a number less than 1000\n");
    scanf("%u", &n);

    x = (n >> 1) + (n >> 2);
    y = (n >> 1) + (n >> 3) + (n >> 6) - (n >> 10) + (x >> 11) - (n >>
    16);
    x += x >> 4;
    x += x >> 8;
    y += y >> 20;
    x += x >> 16;
    y >>= 6;
    *p++ = ((m * n) >> 28)[t];
    x >>= 3;
    *p++ = ((m * ((n > 9 + x * 10) + x)) >> 28)[t];
    *p = ((m * ((n > 99 + y * 100) + y)) >> 28)[t];

    printf("The first digit of the number is %c\n", *p--);
    printf("The second digit of the number is %c\n", *p--);
    printf("The third digit of the number is %c\n", *p);

    return 0;
    }
     
    sfuerst, Jan 9, 2010
    #8
  9. wahid

    wahid Guest

    thank you .
     
    wahid, Jan 10, 2010
    #9
  10. wahid

    Chad Guest

    On Jan 9, 6:53 pm, pete <> wrote:
    > wahid wrote:
    > > Write a program that will have an integer
    > > number input, and show the digits seperately.
    > > (Assume that no number with more than 3
    > > digits will be present in the input)

    >
    > > like :
    > > Enter a Number: 942
    > > The first digit of the number is : 9
    > > The second digit of the number is : 4
    > > The third digit of the number is : 2

    >
    > /* BEGIN new.c */
    >
    > #include <stdio.h>
    >
    > #define MAX             999
    > #define str(x)          # x
    > #define xstr(x)         str(x)
    >
    > int main(void)
    > {
    >      int d;
    >      char array[sizeof xstr(MAX)];
    >      char *string[] = {"first","second","third"};
    >
    >      fputs("Enter an integer from 0 to " xstr(MAX) ": ", stdout);
    >      fflush(stdout);
    >      if (fscanf(stdin, "%d", &d) == 1 && d >= 0 && MAX >= d) {
    >          sprintf(array, "%d", d);
    >          for (d = 0; array[d] != '\0'; ++d) {
    >              printf("The %-6s digit of the number is : %c\n",
    >                  string[d], array[d]);
    >          }
    >      } else {
    >          puts("Try again.");
    >      }
    >      return 0;
    >
    > }
    >
    > /* END new.c */
    >
    > --
    > pete


    Not to sound like a dick. But whatever happened to waiting for the
    person to post an attempted solution before posting a (correct) one?
     
    Chad, Jan 10, 2010
    #10
  11. Chad <> writes:
    > On Jan 9, 6:53 pm, pete <> wrote:
    >> wahid wrote:
    >> > Write a program that will have an integer
    >> > number input, and show the digits seperately.
    >> > (Assume that no number with more than 3
    >> > digits will be present in the input)

    >>
    >> > like :
    >> > Enter a Number: 942
    >> > The first digit of the number is : 9
    >> > The second digit of the number is : 4
    >> > The third digit of the number is : 2

    >>
    >> /* BEGIN new.c */

    [code snipped]
    >>
    >> --
    >> pete

    >
    > Not to sound like a dick. But whatever happened to waiting for the
    > person to post an attempted solution before posting a (correct) one?


    You're assuming pete's solution is correct. Maybe it is, maybe it
    isn't, but I doubt that wahid knows enough to be able to tell -- and I
    for one am not going to tell him which of the posted solutions, if
    any, are actually correct.

    --
    Keith Thompson (The_Other_Keith) <http://www.ghoti.net/~kst>
    Nokia
    "We must do something. This is something. Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"
     
    Keith Thompson, Jan 10, 2010
    #11
  12. On 10 Jan 2010 at 20:11, Keith Thompson wrote:
    > You're assuming pete's solution is correct.


    I don't think he's assuming anything of the sort. What makes you think
    he hasn't checked through pete's solution and *found* it to be correct?

    > Maybe it is, maybe it isn't,


    Let me help you out, Keith: it is.

    > I doubt that wahid knows enough to be able to tell -- and I for one am
    > not going to tell him which of the posted solutions, if any, are
    > actually correct.


    You've missed the boat here Keith - correct solutions to all the posted
    problems have already been supplied, and you can bet your life that if
    any of them are incorrect, then there will be a whole horde of people
    falling over themselves to trip me up and pick holes in my code if
    they're there - that's the "peer review" that you love so much in
    action!
     
    Antoninus Twink, Jan 10, 2010
    #12
  13. pete <> writes:
    [snip]
    > I don't care if OP wants to copy homework solutions
    > and learn nothing.


    I suggest that you should care. Surely if you want to find little
    programming puzzles for yourself, you can do so without helping
    someone cheat.

    --
    Keith Thompson (The_Other_Keith) <http://www.ghoti.net/~kst>
    Nokia
    "We must do something. This is something. Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"
     
    Keith Thompson, Jan 11, 2010
    #13
  14. wahid

    Chad Guest

    On Jan 10, 4:36 pm, pete <> wrote:
    > Antoninus Twink wrote:
    > > On 10 Jan 2010 at 20:11, Keith Thompson wrote:

    >
    > >>You're assuming pete's solution is correct.

    >
    > > I don't think he's assuming anything of the sort. What makes you think
    > > he hasn't checked through pete's solution and *found* it to be correct?

    >
    > >>Maybe it is, maybe it isn't,

    >
    > > Let me help you out, Keith: it is.

    >
    > >>I doubt that wahid knows enough to be able to tell -- and I for one am
    > >>not going to tell him which of the posted solutions, if any, are
    > >>actually correct.

    >
    > > You've missed the boat here Keith - correct solutions to all the posted
    > > problems have already been supplied, and you can bet your life that if
    > > any of them are incorrect, then there will be a whole horde of people
    > > falling over themselves to trip me up and pick holes in my code if
    > > they're there - that's the "peer review" that you love so much in
    > > action!

    >
    > That's pretty much it.
    >
    > When I post untested code
    > I always get caught
    > And that's what I'm looking for.
    >
    > My criteria for doing a homework problem
    > is that it be somewhat amusing and not too hard.
    >
    >  From time to time an OP has asked questions about my posted code,
    > and then I've explained it to the best of my ability
    > and I suppose the OP was able to pick up something about C.
    >
    > I don't care if OP wants to copy homework solutions
    > and learn nothing.
    >
    > --
    > pete


    That was untested code?! Uh..... here is what I get...

    [cdalten@localhost oakland]$ gcc -Wextra -Wall new.c -o new
    [cdalten@localhost oakland]$ ./new
    Enter an integer from 0 to 999: 321
    The first digit of the number is : 3
    The second digit of the number is : 2
    The third digit of the number is : 1
    [cdalten@localhost oakland]$ ./new
    Enter an integer from 0 to 999: 8888888
    Try again.
    [cdalten@localhost oakland]$ ./new
    Enter an integer from 0 to 999: 45
    The first digit of the number is : 4
    The second digit of the number is : 5
    [cdalten@localhost oakland]$ ./new
    Enter an integer from 0 to 999: 2
    The first digit of the number is : 2
    [cdalten@localhost oakland]$

    I guess that both you and I have vastly different views on what
    "untested code" is.
     
    Chad, Jan 11, 2010
    #14
  15. wahid

    scattered Guest

    On Jan 10, 8:37 pm, Keith Thompson <> wrote:
    > pete <> writes:
    >
    > [snip]
    >
    > > I don't care if OP wants to copy homework solutions
    > > and learn nothing.

    >
    > I suggest that you should care.  Surely if you want to find little
    > programming puzzles for yourself, you can do so without helping
    > someone cheat.
    >


    I agree in general but in this case I suspect that if a professor saw

    #define str(x) # x
    #define xstr(x) str(x)

    in an intro to programming class then that professor would strongly
    suspect that the student has obtained that code from somewhere else
    (unless the textbook covered stringizing macros - which seems beyond
    the scope of an intro text), especially if the student is as weak a
    wahid seems to be. Such a professor could quickly confirm that
    suspicion by asking wahid a simple question or two. What I would
    really have a problem with would be posting code that wahid could
    plausibly turn in as his own.
     
    scattered, Jan 11, 2010
    #15
  16. wahid

    Richard Bos Guest

    pete <> wrote:

    > I don't care if OP wants to copy homework solutions and learn nothing.


    Let me suggest for your consideration that you should, if only because
    he might either get a Green Card and be employed to be your cow-orker,
    or get employed where he is to write some software which you will come
    (possibly by necessity) to rely on.

    Richard
     
    Richard Bos, Jan 11, 2010
    #16
  17. wahid

    Eric Sosman Guest

    On 1/11/2010 1:15 PM, Richard Bos wrote:
    > pete<> wrote:
    >
    >> I don't care if OP wants to copy homework solutions and learn nothing.

    >
    > Let me suggest for your consideration that you should, if only because
    > he might either get a Green Card and be employed to be your cow-orker,
    > or get employed where he is to write some software which you will come
    > (possibly by necessity) to rely on.


    Still worse, you may be assigned to clean up the mess
    he makes ...

    --
    Eric Sosman
    lid
     
    Eric Sosman, Jan 11, 2010
    #17
  18. >>>>> "C" == Chad <> writes:

    C> Not to sound like a dick. But whatever happened to waiting for
    C> the person to post an attempted solution before posting a
    C> (correct) one?

    Posting a possibly correct solution -- I only skimmed it -- that is more
    rigorous and thorough than the homework plagiarist likely has the
    experience to be, and is written in idiomatic C that is likely to be
    well above the homework plagiarist's level of ability seems like another
    good solution to the problem.

    Charlton

    --
    Charlton Wilbur
     
    Charlton Wilbur, Jan 12, 2010
    #18
  19. Charlton Wilbur <> writes:
    >>>>>> "C" == Chad <> writes:

    >
    > C> Not to sound like a dick. But whatever happened to waiting for
    > C> the person to post an attempted solution before posting a
    > C> (correct) one?
    >
    > Posting a possibly correct solution -- I only skimmed it -- that is more
    > rigorous and thorough than the homework plagiarist likely has the
    > experience to be, and is written in idiomatic C that is likely to be
    > well above the homework plagiarist's level of ability seems like another
    > good solution to the problem.


    Assuming that the instructor is sufficiently competent to recognize
    that the submitted code is beyond the student's abilities. If he
    gets enough help cheating, he might be able to fool the instructor
    just because the instructor will never have seen any code the
    student actually wrote.

    --
    Keith Thompson (The_Other_Keith) <http://www.ghoti.net/~kst>
    Nokia
    "We must do something. This is something. Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"
     
    Keith Thompson, Jan 12, 2010
    #19
  20. >>>>> "KT" == Keith Thompson <> writes:

    KT> Charlton Wilbur <> writes:

    >> Posting a possibly correct solution -- I only skimmed it -- that
    >> is more rigorous and thorough than the homework plagiarist likely
    >> has the experience to be, and is written in idiomatic C that is
    >> likely to be well above the homework plagiarist's level of
    >> ability seems like another good solution to the problem.


    KT> Assuming that the instructor is sufficiently competent to
    KT> recognize that the submitted code is beyond the student's
    KT> abilities. If he gets enough help cheating, he might be able to
    KT> fool the instructor just because the instructor will never have
    KT> seen any code the student actually wrote.

    Well, if the instructor is that incompetent, the student is not going to
    learn much either way.

    Charlton


    --
    Charlton Wilbur
     
    Charlton Wilbur, Jan 13, 2010
    #20
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