Data commit

Task/Smith-numbers/Go/smith-numbers.go

@@ -0,0 +1,83 @@
+package main
+
+import "fmt"
+
+func numPrimeFactors(x uint) int {
+	var p uint = 2
+	var pf int
+	if x == 1 {
+		return 1
+	}
+	for {
+		if (x % p) == 0 {
+			pf++
+			x /= p
+			if x == 1 {
+				return pf
+			}
+		} else {
+			p++
+		}
+	}
+}
+
+func primeFactors(x uint, arr []uint) {
+	var p uint = 2
+	var pf int
+	if x == 1 {
+		arr[pf] = 1
+		return
+	}
+	for {
+		if (x % p) == 0 {
+			arr[pf] = p
+			pf++
+			x /= p
+			if x == 1 {
+				return
+			}
+		} else {
+			p++
+		}
+	}
+}
+
+func sumDigits(x uint) uint {
+	var sum uint
+	for x != 0 {
+		sum += x % 10
+		x /= 10
+	}
+	return sum
+}
+
+func sumFactors(arr []uint, size int) uint {
+	var sum uint
+	for a := 0; a < size; a++ {
+		sum += sumDigits(arr[a])
+	}
+	return sum
+}
+
+func listAllSmithNumbers(maxSmith uint) {
+	var arr []uint
+	var a uint
+	for a = 4; a < maxSmith; a++ {
+		numfactors := numPrimeFactors(a)
+		arr = make([]uint, numfactors)
+		if numfactors < 2 {
+			continue
+		}
+		primeFactors(a, arr)
+		if sumDigits(a) == sumFactors(arr, numfactors) {
+			fmt.Printf("%4d ", a)
+		}
+	}
+}
+
+func main() {
+	const maxSmith = 10000
+	fmt.Printf("All the Smith Numbers less than %d are:\n", maxSmith)
+	listAllSmithNumbers(maxSmith)
+	fmt.Println()
+}