Kaprekar numbers: Difference between revisions
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=={{header|FutureBasic}}== |
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<syntaxhighlight lang="futurebasic"> |
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local fn kaprekar( n as NSInteger ) as BOOL |
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NSInteger s = n^2 |
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double t = 10^(int(log(s)) + 1) |
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BOOL result = NO |
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do |
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t = t / 10 |
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if t <= n then break |
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if s - n == int(s/t)*(t-1) then result = YES : exit fn |
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until ( t <= n ) |
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result = ( n = YES ) |
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end fn = result |
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local fn DoIt |
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NSInteger i |
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float n = 0 |
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for i = 1 to 1000000 |
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if ( fn kaprekar(i) ) |
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n++ |
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if i < 1000000 then printf @"%2.f : %ld", n, i |
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end if |
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next |
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print "Kaprekar numbers under 1,000,000 = "; n |
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end fn |
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fn DoIt |
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HandleEvents |
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</syntaxhighlight> |
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{{output}} |
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<pre> |
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1 : 1 |
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2 : 9 |
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3 : 45 |
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4 : 55 |
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5 : 99 |
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6 : 297 |
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7 : 703 |
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8 : 999 |
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9 : 2223 |
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10 : 2728 |
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11 : 4879 |
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12 : 4950 |
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13 : 5050 |
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14 : 5292 |
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15 : 7272 |
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16 : 7777 |
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17 : 9999 |
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18 : 17344 |
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19 : 22222 |
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20 : 38962 |
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21 : 77778 |
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22 : 82656 |
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23 : 95121 |
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24 : 99999 |
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25 : 142857 |
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26 : 148149 |
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27 : 181819 |
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28 : 187110 |
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29 : 208495 |
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30 : 318682 |
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31 : 329967 |
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32 : 351352 |
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33 : 356643 |
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34 : 390313 |
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35 : 461539 |
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36 : 466830 |
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37 : 499500 |
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38 : 500500 |
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39 : 533170 |
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40 : 538461 |
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41 : 609687 |
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42 : 627615 |
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43 : 643357 |
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44 : 648648 |
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45 : 670033 |
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46 : 681318 |
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47 : 791505 |
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48 : 812890 |
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49 : 818181 |
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50 : 851851 |
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51 : 857143 |
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52 : 961038 |
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53 : 994708 |
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54 : 999999 |
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Kaprekar numbers under 1,000,000 = �54 |
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</pre> |
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