Create 中文数字转阿拉伯数字.md

Author: CompetitiveLin

中文数字转阿拉伯数字.md

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+# 中文数字转阿拉伯数字
+
+
+
+字符串处理问题，需要考虑 `万亿`， `十万` 等情况。
+
+```go
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println(solution("二百"))
+}
+
+func solution(chineseNum string) int {
+	res, part, temp := 0, 0, 0
+	numberDict := map[string]int{"零": 0, "一": 1, "二": 2, "三": 3, "四": 4, "五": 5, "六": 6, "七": 7, "八": 8, "九": 9}
+	unitDict := map[string]int{"十": 10, "百": 100, "千": 1000}
+	largeUnitDict := map[string]int{"万": 10000}      // “十万”
+	largerUnitDict := map[string]int{"亿": 100000000} // “万亿”
+	for _, ch := range chineseNum {
+		if val, ok := numberDict[string(ch)]; ok {
+			temp = val
+		} else if val, ok := unitDict[string(ch)]; ok {
+			part += temp * val
+			temp = 0
+		} else if val, ok := largeUnitDict[string(ch)]; ok {
+			part += temp
+			temp = 0
+			part *= val
+		} else if val, ok := largerUnitDict[string(ch)]; ok {
+			part += temp
+			temp = 0
+			part *= val
+			res += part // 亿之前的数直接加到 res 里
+			part = 0
+		}
+
+	}
+	res += part + temp
+	return res
+}
+```
+