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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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77
Task/Continued-fraction-Arithmetic-Construct-from-rational-number/Java/continued-fraction-arithmetic-construct-from-rational-number.java Normal file
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import java.util.Iterator;
import java.util.List;
import java.util.Map;
public class ConstructFromRationalNumber {
private static class R2cf implements Iterator<Integer> {
private int num;
private int den;
R2cf(int num, int den) {
this.num = num;
this.den = den;
}
@Override
public boolean hasNext() {
return den != 0;
}
@Override
public Integer next() {
int div = num / den;
int rem = num % den;
num = den;
den = rem;
return div;
}
}
private static void iterate(R2cf generator) {
generator.forEachRemaining(n -> System.out.printf("%d ", n));
System.out.println();
}
public static void main(String[] args) {
List<Map.Entry<Integer, Integer>> fracs = List.of(
Map.entry(1, 2),
Map.entry(3, 1),
Map.entry(23, 8),
Map.entry(13, 11),
Map.entry(22, 7),
Map.entry(-151, 77)
);
for (Map.Entry<Integer, Integer> frac : fracs) {
System.out.printf("%4d / %-2d = ", frac.getKey(), frac.getValue());
iterate(new R2cf(frac.getKey(), frac.getValue()));
}
System.out.println("\nSqrt(2) ->");
List<Map.Entry<Integer, Integer>> root2 = List.of(
Map.entry( 14_142, 10_000),
Map.entry( 141_421, 100_000),
Map.entry( 1_414_214, 1_000_000),
Map.entry(14_142_136, 10_000_000)
);
for (Map.Entry<Integer, Integer> frac : root2) {
System.out.printf("%8d / %-8d = ", frac.getKey(), frac.getValue());
iterate(new R2cf(frac.getKey(), frac.getValue()));
}
System.out.println("\nPi ->");
List<Map.Entry<Integer, Integer>> pi = List.of(
Map.entry( 31, 10),
Map.entry( 314, 100),
Map.entry( 3_142, 1_000),
Map.entry( 31_428, 10_000),
Map.entry( 314_285, 100_000),
Map.entry( 3_142_857, 1_000_000),
Map.entry( 31_428_571, 10_000_000),
Map.entry(314_285_714, 100_000_000)
);
for (Map.Entry<Integer, Integer> frac : pi) {
System.out.printf("%9d / %-9d = ", frac.getKey(), frac.getValue());
iterate(new R2cf(frac.getKey(), frac.getValue()));
}
}
}