add sub and super stript to number to string

src/number.go

@@ -3,14 +3,12 @@ package main
 import (
 	"fmt"
 	"math/big"
+	"strings"
 )
 
 // a number type
 type number = *big.Rat
 
-// create a number from two integers
-var createNumber = big.NewRat
-
 // create a new number type
 func newNumber() *big.Rat {
 	return new(big.Rat)
@@ -22,10 +20,55 @@ func stringToNumber(str string) (*big.Rat, bool) {
 }
 
 // converts a number type to a string
-func numberToString(num number, fraction bool) string {
-	if fraction {
-		return num.RatString()
+func numberToString(num number, fraction int) string {
+	if fraction != 0 {
+		str := num.RatString()
+		if fraction == 1 {
+			return str
+		}
+		split := strings.SplitN(str, "/", 2)
+		if len(str) == 1 {
+			return split[0]
+		}
+		numerator := split[0]
+		denominator := split[1]
+
+		super := []string{}
+		for i := 0; i < len(numerator); i++ {
+			super = append(super, superscript[numerator[i]])
+		}
+		sub := []string{}
+		for i := 0; i < len(denominator); i++ {
+			sub = append(sub, subscript[denominator[i]])
+		}
+		return strings.Join(super, "") + "/" + strings.Join(sub, "")
 	}
 	x, _ := num.Float64()
 	return fmt.Sprint(x)
 }
+
+var superscript = map[byte]string{
+	'0': "⁰",
+	'1': "¹",
+	'2': "²",
+	'3': "³",
+	'4': "⁴",
+	'5': "⁵",
+	'6': "⁶",
+	'7': "⁷",
+	'8': "⁸",
+	'9': "⁹",
+}
+
+var subscript = map[byte]string{
+	'0': "₀",
+	'1': "₁",
+	'2': "₂",
+	'3': "₃",
+	'4': "₄",
+	'5': "₅",
+	'6': "₆",
+	'7': "₇",
+	'8': "₈",
+	'9': "₉",
+}

src/translate.go

@@ -5,12 +5,6 @@ import (
 )
 
 func translate(code string) {
-	a := createNumber(7, 1)
-	b, worked := stringToNumber("1e-1")
-	if worked {
-		output := newNumber().Mul(a, b)
-		output.Add(output, a)
-		output.Sub(output, a)
-		fmt.Println(numberToString(output, true))
-	}
+	output, _ := newNumber().SetString("3.1415")
+	fmt.Println(numberToString(output, 0))
 }