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src/money/numberToWords.ts

@@ -8,6 +8,54 @@ const units2 = [
   '角', '分', '厘', '毫', '丝'
 ];
 
-export default function numberToWords(num: number): string {
-  return 'one';
+export default function numberToWords(input: string|number): string {
+  input=String(input)
+  let newInput
+  if (input === undefined || input === null || input === '' || !/^[\-]?\d{0,21}(\.\d{0,3})?$/.test(input)) {
+      return input;
+  }
+  if(/[\-]\d{0,21}(\.\d{0,3})?$/.test(input)){
+      newInput = input.replace(/-/,"");
+  }else{
+      newInput = input;
+  }
+  newInput = newInput.replace(/^0+$/, "0").replace(/^0+([1-9].*)/, "$1");
+  const CN1 = ['零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖'];
+  const CN2 = ['元', '万', '亿','兆','京','垓'];
+  const CN3 = ['', '拾', '佰', '仟'];
+  const CN4 = ['角', '分', '厘'];
+  newInput = newInput + "";
+  const arr = newInput.split(".");
+  let int = arr[0], dot = arr[1];//分成整数和小数两个部分
+  let intArr = int.split("");
+  let counter = 0;
+  for (let i = intArr.length - 1; i >= 0; i--) {
+      intArr[i] = CN1[intArr[i]] + CN3[counter % 4];
+      if (counter % 4 == 0) {
+          intArr[i] += CN2[counter / 4];
+      }
+      counter++;
+  }
+  int = intArr.join("").replace(/(零仟|零佰|零拾)/g, "零").replace(/零+/g, "零").replace(/零(元|万|亿|兆|京|垓)/g, "$1").replace(/亿万/, "亿").replace(/兆亿/,"兆").replace(/京兆/,"京").replace(/垓京/,"垓");
+  if (int === '元') {
+      int = '零元';
+  }
+  if (!dot || /^0+$/.test(dot)) {
+      if(/^[\-]\d{0,21}(\.\d{0,3})?$/.test(input)){
+          let value = input.length==1?"负":"负"+int+"整"
+          return value;
+      }else{
+          return int + "整";
+      }
+  } else {
+      dot = dot.split("").map(function (item, index) {
+          return CN1[item] + CN4[index];
+      }).join("");
+      dot = dot.replace(/(零角|零分|零厘)/g, "零").replace(/零+/g, "零").replace(/零$/, "");
+      if(/^[\-]\d{0,21}(\.\d{0,3})?$/.test(input)){
+          return "负" + int + dot;
+      }else{
+          return int + dot;
+      }
+  }
 }
\ No newline at end of file

test/money/numberToWords.test.ts

@@ -2,8 +2,20 @@ import { describe, it, expect } from 'vitest'
 import numberToWords from '../../src/money/numberToWords'
 
 describe('numberToWords', () => {
-  it('1 return 壹元', () => {
-    expect(numberToWords(1)).toBe('壹元')
+  it('1 toBe 壹元整', () => {
+    expect(numberToWords(1)).toBe('壹元整')
+  })
+  it('1.01 toBe 壹元零壹分', () => {
+    expect(numberToWords(1.01)).toBe('壹元零壹分')
+  })
+  it('17916.67 toBe 壹万柒仟玖佰壹拾陆元陆角柒分', () => {
+    expect(numberToWords(17916.67)).toBe('壹万柒仟玖佰壹拾陆元陆角柒分')
+  })
+  it('100010000.00 toBe 壹亿零壹万元', () => {
+    expect(numberToWords(100010000.00)).toBe('壹亿零壹万元整')
+  })
+  it('100010000.01 toBe 壹亿零壹万元壹分', () => {
+    expect(numberToWords(100010000.01)).toBe('壹亿零壹万元壹分')
   })
 })