Data commit

Task/Happy-numbers/Vala/happy-numbers.vala

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+using Gee;
+
+/* function to sum the square of the digits */
+int sum(int input){
+	// convert input int to string
+	string input_str = input.to_string();
+	int total = 0;
+	// read through each character in string, square them and add to total
+	for (int x = 0; x < input_str.length; x++){
+		// char.digit_value converts char to the decimal value the char it represents holds
+		int digit = input_str[x].digit_value();
+		total += (digit * digit);
+	}
+
+	return total;
+} // end sum
+
+/* function to decide if a number is a happy number */
+bool is_happy(int total){
+	var past = new HashSet<int>();
+	while(true){
+		total = sum(total);
+		if (total == 1){
+			return true;}
+		
+		if (total in past){
+			return false;}
+		
+		past.add(total);
+	} // end while loop
+} // end happy
+
+public static void main(){
+	var happynums = new ArrayList<int>();
+	int x = 1;
+	
+	while (happynums.size < 8){
+		if (is_happy(x) == true)
+			happynums.add(x);
+		x++;
+	}
+	
+	foreach(int num in happynums)
+		stdout.printf("%d ", num);
+	stdout.printf("\n");
+} // end main