Prime decomposition: Difference between revisions
→{{header|ANSI BASIC}}: Added a solution.
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=={{header|BASIC}}==
==={{header|ANSI BASIC}}===
{{trans|XPL0}}
{{works with|Decimal BASIC}}
<syntaxhighlight lang="basic">
100 PROGRAM PrimeDecomposition
110 REM -(2^31) has most prime factors (31 twos) than other 32-bit signed integer.
120 DIM Facs(0 TO 30)
130 INPUT PROMPT "Enter a number: ": N
140 CALL CalcFacs(N, Facs, FacsCnt)
150 REM There is at least one factor
160 FOR I = 0 TO FacsCnt - 1
170 PRINT Facs(I);
180 NEXT I
190 PRINT
200 END
210 REM **
220 EXTERNAL SUB CalcFacs(N, Facs(), FacsCnt)
230 LET N = ABS(N)
240 LET FacsCnt = 0
250 IF N >= 2 THEN
260 LET I = 2
270 DO WHILE I * I <= N
280 IF MOD(N, I) = 0 THEN
290 LET N = INT(N / I)
300 LET Facs(FacsCnt) = I
310 LET FacsCnt = FacsCnt + 1
320 LET I = 2
330 ELSE
340 LET I = I + 1
350 END IF
360 LOOP
370 LET Facs(FacsCnt) = N
380 LET FacsCnt = FacsCnt + 1
390 END IF
400 END SUB
</syntaxhighlight>
{{out}} 3 runs.
<pre>
Enter a number: 32
2 2 2 2 2
</pre>
<pre>
Enter a number: 2520
2 2 2 3 3 5 7
</pre>
<pre>
Enter a number: 13
13
</pre>
==={{header|Applesoft BASIC}}===
<syntaxhighlight lang="applesoftbasic">9040 PF(0) = 0 : SC = 0
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