解决思路
一. 任务需求
1. 将数字转为中文读法
2. 支持处理整数, 小数
3. 支持正数与负数的处理
数值分解
1. 数字的转换需要首先将数值分解为可管理的单元：
1.1 整数部分按数位分割, 每四位一组: 对应一级大数单位 (千, 万, 亿, 兆)
1.2 小数部分将每位数直接转换为相应的中文数字, 从左到右读出
特殊情况
1. 特殊的数字如 “零” 的处理需特别注意, 避免在读法中出现连续的 “零” , 并正确使用 “点” 表示小数部分
大数单位
1. 根据数位系统, 超过四位的数需要添加适当的单位 (万, 亿, 兆等), 这些单位在数值中有明确的层级关系和位置
数据处理
1. 对于负数需在最终的中文读法前添加 “负” 字
2. 小数部分则按照每位对应的中文数字顺序读出，前面用 “点” 来分隔。
测试代码
1. std::cout << numberToChinese("9999") << std::endl;
2. std::cout << numberToChinese("99999999") << std::endl;
3. std::cout << numberToChinese("999999999999") << std::endl;
4. std::cout << numberToChinese("9999999999999999") << std::endl;
5. std::cout << numberToChinese("9999.9999") << std::endl;
6. std::cout << numberToChinese("99999999.99999999") << std::endl;
7. std::cout << numberToChinese("999999999999.999999999999") << std::endl;
8. std::cout << numberToChinese("9999999999999999.9999999999999999")
9. std::cout << numberToChinese("-9999") << std::endl;
10. std::cout << numberToChinese("-99999999") << std::endl;
11. std::cout << numberToChinese("-999999999999") << std::endl;
12. std::cout << numberToChinese("-9999999999999999") << std::endl;
13. std::cout << numberToChinese("-9999.9999") << std::endl;
14. std::cout << numberToChinese("-99999999.99999999") << std::endl;
15. std::cout << numberToChinese("-999999999999.999999999999") << std::endl;
16. std::cout << numberToChinese("-9999999999999999.9999999999999999") << std::endl;
17. std::cout << numberToChinese("09999") << std::endl;
18. std::cout << numberToChinese("099999999") << std::endl;
19. std::cout << numberToChinese("0999999999999") << std::endl;
20. std::cout << numberToChinese("09999999999999999") << std::endl;
21. std::cout << numberToChinese("09999.9999") << std::endl;
22. std::cout << numberToChinese("099999999.99999999") << std::endl;
23. std::cout << numberToChinese("0999999999999.999999999999") << std::endl;
24. std::cout << numberToChinese("09999999999999999.9999999999999999") << std::endl;
25. std::cout << numberToChinese("-09999") << std::endl;
26. std::cout << numberToChinese("-099999999") << std::endl;
27. std::cout << numberToChinese("-0999999999999") << std::endl;
28. std::cout << numberToChinese("-09999999999999999") << std::endl;
29. std::cout << numberToChinese("-09999.9999") << std::endl;
30. std::cout << numberToChinese("-099999999.99999999") << std::endl;
31. std::cout << numberToChinese("-0999999999999.999999999999") << std::endl;
31. std::cout << numberToChinese("-09999999999999999.9999999999999999") << std::endl;
测试结果
1. 九千九百九十九
2. 九千九百九十九万九千九百九十九
3. 九千九百九十九亿九千九百九十九万九千九百九十九
4. 九千九百九十九兆九千九百九十九亿九千九百九十九万九千九百九十九
5. 九千九百九十九点九九九九
6. 九千九百九十九万九千九百九十九点九九九九九九九九
7. 九千九百九十九亿九千九百九十九万九千九百九十九点九九九九九九九九九九九九
8. 九千九百九十九兆九千九百九十九亿九千九百九十九万九千九百九十九点九九九九九九九九九九九九九九九九
9. 负九千九百九十九
10. 负九千九百九十九万九千九百九十九
11. 负九千九百九十九亿九千九百九十九万九千九百九十九
12. 负九千九百九十九兆九千九百九十九亿九千九百九十九万九千九百九十九
13. 负九千九百九十九点九九九九
14. 负九千九百九十九万九千九百九十九点九九九九九九九九
15. 负九千九百九十九亿九千九百九十九万九千九百九十九点九九九九九九九九九九九九
16. 负九千九百九十九兆九千九百九十九亿九千九百九十九万九千九百九十九点九九九九九九九九九九九九九九九九
17. 九千九百九十九
18. 九千九百九十九万九千九百九十九
19. 九千九百九十九亿九千九百九十九万九千九百九十九
20. 九千九百九十九兆九千九百九十九亿九千九百九十九万九千九百九十九
21. 九千九百九十九点九九九九
22. 九千九百九十九万九千九百九十九点九九九九九九九九
23. 九千九百九十九亿九千九百九十九万九千九百九十九点九九九九九九九九九九九九
24. 九千九百九十九兆九千九百九十九亿九千九百九十九万九千九百九十九点九九九九九九九九九九九九九九九九
25. 负九千九百九十九
26. 负九千九百九十九万九千九百九十九
27. 负九千九百九十九亿九千九百九十九万九千九百九十九
28. 负九千九百九十九兆九千九百九十九亿九千九百九十九万九千九百九十九
29. 负九千九百九十九点九九九九
30. 负九千九百九十九万九千九百九十九点九九九九九九九九
31. 负九千九百九十九亿九千九百九十九万九千九百九十九点九九九九九九九九九九九九
32. 负九千九百九十九兆九千九百九十九亿九千九百九十九万九千九百九十九点九九九九九九九九九九九九九九九九
代码文件
#include <iostream>
#include <string>
#include <vector>
const std::vector digits = { "零", "一", "二", "三", "四", "五", "六", "七", "八", "九" };
const std::vector units = { "", "十", "百", "千" };
const std::vector big_units = { "", "万", "亿", "兆" };
static std::string convertSection(unsigned int num, bool isLastSection) {
std::string result = "";
int i = 0;
while (num > 0) {
int digit = num % 10;
if (digit > 0) {
result = digits[zxsq-anti-bbcode-digit] + (i < units.size() ? units[zxsq-anti-bbcode-i] : "") + result;
}
else if (!result.empty() && result.back() != '零') {
result = "零" + result;
}
num /= 10;
++i;
}
if (!isLastSection && !result.empty() && result.back() == '零') {
result.pop_back();
}
return result;
}
std::string numberToChinese(const std::string& number) {
size_t dotPos = number.find('.');
std::string integerPartStr = number.substr(0, dotPos);
std::string fractionalPartStr = dotPos != std::string::npos ? number.substr(dotPos + 1) : "";
bool isNegative = !integerPartStr.empty() && integerPartStr[zxsq-anti-bbcode-0] == '-';
unsigned long long integerPart = std::stoull(isNegative ? integerPartStr.substr(1) : integerPartStr);
std::string result = "";
std::vector parts;
int counter = 0;
while (integerPart > 0) {
unsigned int part = integerPart % 10000;
std::string section = convertSection(part, integerPart < 10000);
if (!section.empty()) {
if (counter < big_units.size()) {
section += big_units[zxsq-anti-bbcode-counter];
}
parts.push_back(section);
}
integerPart /= 10000;
counter++;
}
if (parts.empty()) {
parts.push_back("零");
}
for (auto it = parts.rbegin(); it != parts.rend(); ++it) {
result += *it;
}
if (!fractionalPartStr.empty()) {
result += "点";
for (char digit : fractionalPartStr) {
if (digit >= '0' && digit <= '9') {
result += digits[digit - '0'];
}
}
}
if (isNegative) {
result = "负" + result;
}
return result;
}
int main() {
std::cout << numberToChinese("9999") << std::endl;
std::cout << numberToChinese("99999999") << std::endl;
std::cout << numberToChinese("999999999999") << std::endl;
std::cout << numberToChinese("9999999999999999") << std::endl;
std::cout << numberToChinese("9999.9999") << std::endl;
std::cout << numberToChinese("99999999.99999999") << std::endl;
std::cout << numberToChinese("999999999999.999999999999") << std::endl;
std::cout << numberToChinese("9999999999999999.9999999999999999") << std::endl;
std::cout << numberToChinese("-9999") << std::endl;
std::cout << numberToChinese("-99999999") << std::endl;
std::cout << numberToChinese("-999999999999") << std::endl;
std::cout << numberToChinese("-9999999999999999") << std::endl;
std::cout << numberToChinese("-9999.9999") << std::endl;
std::cout << numberToChinese("-99999999.99999999") << std::endl;
std::cout << numberToChinese("-999999999999.999999999999") << std::endl;
std::cout << numberToChinese("-9999999999999999.9999999999999999") << std::endl;
std::cout << numberToChinese("09999") << std::endl;
std::cout << numberToChinese("099999999") << std::endl;
std::cout << numberToChinese("0999999999999") << std::endl;
std::cout << numberToChinese("09999999999999999") << std::endl;
std::cout << numberToChinese("09999.9999") << std::endl;
std::cout << numberToChinese("099999999.99999999") << std::endl;
std::cout << numberToChinese("0999999999999.999999999999") << std::endl;
std::cout << numberToChinese("09999999999999999.9999999999999999") << std::endl;
std::cout << numberToChinese("-09999") << std::endl;
std::cout << numberToChinese("-099999999") << std::endl;
std::cout << numberToChinese("-0999999999999") << std::endl;
std::cout << numberToChinese("-09999999999999999") << std::endl;
std::cout << numberToChinese("-09999.9999") << std::endl;
std::cout << numberToChinese("-099999999.99999999") << std::endl;
std::cout << numberToChinese("-0999999999999.999999999999") << std::endl;
std::cout << numberToChinese("-09999999999999999.9999999999999999") << std::endl;
return 0;
}
