Added code to help convert between number bases

includes/base-helpers.hpp

@@ -0,0 +1,48 @@
+#include <string>
+#include <cmath>
+#include <iostream>
+#include <algorithm>
+
+std::string possible_chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+
+/* Convert the given value from the given base, to base 10 */
+int to_decimal(std::string num, int from_base) {
+	char current_char = 0;
+	int index = 0;
+	int value = 0;
+
+	/* Here, we convert 'num' to decimal (base 10) - Find the index of
+	every character in the string, in 'possible_chars' and
+	compute the value using  */
+	for (int i=0; i < (int)num.length(); i++) {
+		current_char = num.at(i);
+		index = possible_chars.find(current_char);
+		value += pow(from_base, num.length() - i - 1) * index;
+	}
+
+	return value;
+}
+
+/* Convert the given value from base 10 to the given base */
+std::string from_decimal(int num, int to_base) {
+	std::string return_val;
+	int val = 0;
+	while (num > 0) {
+		val = num % to_base;
+		return_val.push_back(possible_chars[val]);
+		num /= to_base;
+	}
+
+	/* Reverse the string, since we started from the right */
+	std::reverse(return_val.begin(), return_val.end());
+
+	return return_val;
+}
+
+/* Convert the given value from 'from_base', to 'to_base' */
+std::string base_convert(std::string num, int from_base, int to_base) {
+	int temp = to_decimal(num, from_base);
+	std::string result = from_decimal(temp, to_base);
+
+	return result;
+}