Strange numbers: Difference between revisions
Dialects of BASIC moved to the BASIC section.
(→{{header|ALGOL W}}: Simplify - treat single digit numbers as strange, as in other samples) |
(Dialects of BASIC moved to the BASIC section.) |
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=={{header|BASIC}}==
==={{header|FreeBASIC}}===▼
<syntaxhighlight lang="basic">10 DEFINT I,J,K: DEFSTR S▼
<syntaxhighlight lang="freebasic">function is_strange( n as ulongint ) as boolean▼
20 FOR I=100 TO 500▼
dim as uinteger d, ld, a▼
30 S=STR$(I)▼
if n<10 then return true 'arbitrary, but makes the recursion easier▼
40 FOR J=2 TO LEN(S)-1▼
d = n mod 10▼
50 K=ABS(VAL(MID$(S,J,1))-VAL(MID$(S,J+1,1)))▼
a = abs(d - ld)▼
70 NEXT J▼
if a = 2 or a = 3 or a = 5 or a = 7 then return is_strange(n\10) else return false▼
80 PRINT I,▼
end function▼
90 NEXT I</syntaxhighlight>▼
print "Strange numbers between 100 and 500"▼
for n as uinteger = 101 to 499▼
if is_strange(n) then print n;" ";▼
next n▼
print : print▼
dim as integer c = 0▼
for n as ulongint = 1000000000 to 1999999999▼
if is_strange(n) then c+=1▼
next n▼
print using "There are ####### 10-digit strange numbers beginning with 1.";c</syntaxhighlight>▼
{{out}}<pre>▼
Strange numbers between 100 and 500▼
130 131 135 136 138 141 142 146 147 149 161 163 164 168 169 181 183 185 186 202 203 205 207 241 242 246 247 249 250 252 253 257 258 270 272 274 275 279 292 294 296 297 302 303 305 307 313 314 316 318 350 352 353 357 358 361 363 364 368 369 381 383 385 386 413 414 416 418 420 424 425 427 429 461 463 464 468 469 470 472 474 475 479 492 494 496 497 ▼
There are 853423 10-digit strange numbers beginning with 1.</pre>▼
==={{header|GW-BASIC}}===
{{works with|BASICA}}
{{works with|QuickBASIC}}
20 DEFINT I-K: DEFSTR S
70 IF K <> 2 AND K <> 3 AND K <> 5 AND K <> 7 THEN 100
100 NEXT I
{{out}}
<pre> 130 131 135 136 138
Line 548 ⟶ 580:
474 475 479 492 494
496 497</pre>
=={{header|BCPL}}==
<syntaxhighlight lang="bcpl">get "libhdr"
Line 1,112 ⟶ 1,145:
{ 1 8 6 9 7 9 7 9 7 9 }
</pre>
▲=={{header|FreeBASIC}}==
▲<syntaxhighlight lang="freebasic">function is_strange( n as ulongint ) as boolean
▲ dim as uinteger d, ld, a
▲ if n<10 then return true 'arbitrary, but makes the recursion easier
▲ d = n mod 10
▲ a = abs(d - ld)
▲ if a = 2 or a = 3 or a = 5 or a = 7 then return is_strange(n\10) else return false
▲end function
▲print "Strange numbers between 100 and 500"
▲for n as uinteger = 101 to 499
▲ if is_strange(n) then print n;" ";
▲next n
▲print : print
▲dim as integer c = 0
▲for n as ulongint = 1000000000 to 1999999999
▲ if is_strange(n) then c+=1
▲next n
▲print using "There are ####### 10-digit strange numbers beginning with 1.";c</syntaxhighlight>
▲{{out}}<pre>
▲Strange numbers between 100 and 500
▲130 131 135 136 138 141 142 146 147 149 161 163 164 168 169 181 183 185 186 202 203 205 207 241 242 246 247 249 250 252 253 257 258 270 272 274 275 279 292 294 296 297 302 303 305 307 313 314 316 318 350 352 353 357 358 361 363 364 368 369 381 383 385 386 413 414 416 418 420 424 425 427 429 461 463 464 468 469 470 472 474 475 479 492 494 496 497
▲There are 853423 10-digit strange numbers beginning with 1.</pre>
=={{header|Forth}}==
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