New Go

BasicSyntax/prime/toeng.go

@@ -0,0 +1,59 @@
+package main
+
+import "fmt"
+
+func numberToWords(n int) string {
+	if n < 0 || n >= 1000 {
+		return "ERR"
+	}
+
+	ones := []string{"zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"}
+	teens := []string{"ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen",
+		"sixteen", "seventeen", "eighteen", "nineteen"}
+	tens := []string{"", "", "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"}
+
+	words := []string{}
+
+	// 百位
+	if n >= 100 {
+		words = append(words, ones[n/100]+" hundred")
+		n %= 100
+		if n != 0 {
+			words = append(words, "and")
+		}
+	}
+
+	// 十位和个位
+	if n >= 20 {
+		if n%10 != 0 {
+			words = append(words, tens[n/10]+"-"+ones[n%10])
+		} else {
+			words = append(words, tens[n/10])
+		}
+	} else if n >= 10 {
+		words = append(words, teens[n-10])
+	} else if n > 0 {
+		words = append(words, ones[n])
+	} else if len(words) == 0 { // n == 0
+		words = append(words, "zero")
+	}
+
+	return joinWords(words)
+}
+
+func joinWords(words []string) string {
+	res := ""
+	for i, w := range words {
+		if i > 0 {
+			res += " "
+		}
+		res += w
+	}
+	return res
+}
+
+func main() {
+	var n int
+	fmt.Scan(&n)
+	fmt.Println(numberToWords(n))
+}