diff --git a/DIRECTORY.md b/DIRECTORY.md index 2b47ae08b..bb952a26c 100644 --- a/DIRECTORY.md +++ b/DIRECTORY.md @@ -789,6 +789,7 @@ * conversions * [AffineConverterTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/conversions/AffineConverterTest.java) * [AnyBaseToDecimalTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/conversions/AnyBaseToDecimalTest.java) + * [AnytoAnyTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/conversions/AnytoAnyTest.java) * [BinaryToDecimalTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/conversions/BinaryToDecimalTest.java) * [BinaryToHexadecimalTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/conversions/BinaryToHexadecimalTest.java) * [BinaryToOctalTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/conversions/BinaryToOctalTest.java) diff --git a/src/main/java/com/thealgorithms/conversions/AnytoAny.java b/src/main/java/com/thealgorithms/conversions/AnytoAny.java index 801e49303..e7bdbc2b7 100644 --- a/src/main/java/com/thealgorithms/conversions/AnytoAny.java +++ b/src/main/java/com/thealgorithms/conversions/AnytoAny.java @@ -1,35 +1,68 @@ package com.thealgorithms.conversions; -import java.util.Scanner; - -// given a source number , source base, destination base, this code can give you the destination -// number. -// sn ,sb,db ---> ()dn . this is what we have to do . - +/** + * A utility class for converting numbers from any base to any other base. + * + * This class provides a method to convert a source number from a given base + * to a destination number in another base. Valid bases range from 2 to 10. + */ public final class AnytoAny { private AnytoAny() { } - public static void main(String[] args) { - Scanner scn = new Scanner(System.in); - int sn = scn.nextInt(); - int sb = scn.nextInt(); - int db = scn.nextInt(); - int m = 1; - int dec = 0; - int dn = 0; - while (sn != 0) { - dec = dec + (sn % 10) * m; - m *= sb; - sn /= 10; + /** + * Converts a number from a source base to a destination base. + * + * @param sourceNumber The number in the source base (as an integer). + * @param sourceBase The base of the source number (between 2 and 10). + * @param destBase The base to which the number should be converted (between 2 and 10). + * @throws IllegalArgumentException if the bases are not between 2 and 10. + * @return The converted number in the destination base (as an integer). + */ + public static int convertBase(int sourceNumber, int sourceBase, int destBase) { + if (sourceBase < 2 || sourceBase > 10 || destBase < 2 || destBase > 10) { + throw new IllegalArgumentException("Bases must be between 2 and 10."); } - m = 1; - while (dec != 0) { - dn = dn + (dec % db) * m; - m *= 10; - dec /= db; + + int decimalValue = toDecimal(sourceNumber, sourceBase); + return fromDecimal(decimalValue, destBase); + } + + /** + * Converts a number from a given base to its decimal representation (base 10). + * + * @param number The number in the original base. + * @param base The base of the given number. + * @return The decimal representation of the number. + */ + private static int toDecimal(int number, int base) { + int decimalValue = 0; + int multiplier = 1; + + while (number != 0) { + decimalValue += (number % 10) * multiplier; + multiplier *= base; + number /= 10; } - System.out.println(dn); - scn.close(); + return decimalValue; + } + + /** + * Converts a decimal (base 10) number to a specified base. + * + * @param decimal The decimal number to convert. + * @param base The destination base for conversion. + * @return The number in the specified base. + */ + private static int fromDecimal(int decimal, int base) { + int result = 0; + int multiplier = 1; + + while (decimal != 0) { + result += (decimal % base) * multiplier; + multiplier *= 10; + decimal /= base; + } + return result; } } diff --git a/src/test/java/com/thealgorithms/conversions/AnytoAnyTest.java b/src/test/java/com/thealgorithms/conversions/AnytoAnyTest.java new file mode 100644 index 000000000..cdc012180 --- /dev/null +++ b/src/test/java/com/thealgorithms/conversions/AnytoAnyTest.java @@ -0,0 +1,48 @@ +package com.thealgorithms.conversions; + +import static org.junit.jupiter.api.Assertions.assertEquals; +import static org.junit.jupiter.api.Assertions.assertThrows; + +import org.junit.jupiter.api.Test; + +public class AnytoAnyTest { + + @Test + void testValidConversions() { + assertEquals(101, AnytoAny.convertBase(5, 10, 2), "Decimal 5 should convert to binary 101"); + assertEquals(2, AnytoAny.convertBase(2, 2, 10), "Binary 10 should convert to decimal 2"); + assertEquals(6, AnytoAny.convertBase(110, 2, 8), "Binary 110 should convert to octal 6"); + assertEquals(111, AnytoAny.convertBase(7, 10, 2), "Decimal 7 should convert to binary 111"); + } + + @Test + void testDecimalToBinary() { + assertEquals(1101, AnytoAny.convertBase(13, 10, 2), "Decimal 13 should convert to binary 1101"); + assertEquals(0, AnytoAny.convertBase(0, 10, 2), "Decimal 0 should convert to binary 0"); + } + + @Test + void testBinaryToDecimal() { + assertEquals(13, AnytoAny.convertBase(1101, 2, 10), "Binary 1101 should convert to decimal 13"); + assertEquals(0, AnytoAny.convertBase(0, 2, 10), "Binary 0 should convert to decimal 0"); + } + + @Test + void testOctalToDecimal() { + assertEquals(8, AnytoAny.convertBase(10, 8, 10), "Octal 10 should convert to decimal 8"); + assertEquals(65, AnytoAny.convertBase(101, 8, 10), "Octal 101 should convert to decimal 65"); + } + + @Test + void testInvalidBases() { + assertThrows(IllegalArgumentException.class, () -> AnytoAny.convertBase(5, 1, 10), "Source base less than 2 should throw IllegalArgumentException"); + + assertThrows(IllegalArgumentException.class, () -> AnytoAny.convertBase(5, 10, 11), "Destination base greater than 10 should throw IllegalArgumentException"); + } + + @Test + void testLargeNumberConversion() { + assertEquals(1111101000, AnytoAny.convertBase(1000, 10, 2), "Decimal 1000 should convert to binary 1111101000"); + assertEquals(1750, AnytoAny.convertBase(1000, 10, 8), "Decimal 1000 should convert to octal 1750"); + } +}