货币代码 ISO 4217

复制import json
from typing import Optional

# 内置 ISO 4217 货币代码映射（部分示例）
CURRENCY_MAP = {
    "CNY": {"code": "CNY", "number": 156, "symbol": "¥", "name": "人民币", "country": "中国"},
    "USD": {"code": "USD", "number": 840, "symbol": "$", "name": "美元", "country": "美国"},
    "EUR": {"code": "EUR", "number": 978, "symbol": "€", "name": "欧元", "country": "欧元区"},
    "JPY": {"code": "JPY", "number": 392, "symbol": "¥", "name": "日元", "country": "日本"},
    "GBP": {"code": "GBP", "number": 826, "symbol": "£", "name": "英镑", "country": "英国"},
}

def lookup_currency(code: str) -> Optional[dict]:
    """根据三字码查询货币信息，不区分大小写"""
    return CURRENCY_MAP.get(code.upper())

# 示例：查询 USD
result = lookup_currency("usd")
if result:
    print(json.dumps(result, ensure_ascii=False, indent=2))
else:
    print("未找到该货币代码")

# 输出：
# {
#   "code": "USD",
#   "number": 840,
#   "symbol": "$",
#   "name": "美元",
#   "country": "美国"
# }

复制package main

import (
	"encoding/json"
	"fmt"
	"strings"
)

// Currency 货币信息结构
type Currency struct {
	Code    string `json:"code"`
	Number  int    `json:"number"`
	Symbol  string `json:"symbol"`
	Name    string `json:"name"`
	Country string `json:"country"`
}

var currencyMap = map[string]Currency{
	"CNY": {Code: "CNY", Number: 156, Symbol: "¥", Name: "人民币", Country: "中国"},
	"USD": {Code: "USD", Number: 840, Symbol: "$", Name: "美元", Country: "美国"},
	"EUR": {Code: "EUR", Number: 978, Symbol: "€", Name: "欧元", Country: "欧元区"},
	"JPY": {Code: "JPY", Number: 392, Symbol: "¥", Name: "日元", Country: "日本"},
	"GBP": {Code: "GBP", Number: 826, Symbol: "£", Name: "英镑", Country: "英国"},
}

func lookupCurrency(code string) (*Currency, error) {
	c, ok := currencyMap[strings.ToUpper(code)]
	if !ok {
		return nil, fmt.Errorf("未找到货币代码: %s", code)
	}
	return &c, nil
}

func main() {
	result, err := lookupCurrency("eur")
	if err != nil {
		fmt.Println(err)
		return
	}
	b, _ := json.MarshalIndent(result, "", "  ")
	fmt.Println(string(b))
	// 输出：
	// {
	//   "code": "EUR",
	//   "number": 978,
	//   "symbol": "€",
	//   "name": "欧元",
	//   "country": "欧元区"
	// }
}

复制// 内置 ISO 4217 货币代码映射（部分示例）
const currencyMap = {
  CNY: { code: 'CNY', number: 156, symbol: '¥', name: '人民币', country: '中国' },
  USD: { code: 'USD', number: 840, symbol: '$', name: '美元', country: '美国' },
  EUR: { code: 'EUR', number: 978, symbol: '€', name: '欧元', country: '欧元区' },
  JPY: { code: 'JPY', number: 392, symbol: '¥', name: '日元', country: '日本' },
  GBP: { code: 'GBP', number: 826, symbol: '£', name: '英镑', country: '英国' },
};

function lookupCurrency(code) {
  const upper = code.toUpperCase();
  const result = currencyMap[upper];
  if (!result) {
    throw new Error(`未找到货币代码: ${code}`);
  }
  return result;
}

// 示例：查询 JPY
try {
  const info = lookupCurrency('jpy');
  console.log(JSON.stringify(info, null, 2));
  // 输出：
  // {
  //   "code": "JPY",
  //   "number": 392,
  //   "symbol": "¥",
  //   "name": "日元",
  //   "country": "日本"
  // }
} catch (e) {
  console.error(e.message);
}