人民币大小写转换（阿拉伯数字和汉字转换）

/*******************************************************************************
Project Code  : Account
File name     : 
Author        : Latte
Description   : 阿拉伯数字转为中文字符串
Function List :
--------------------------------------------------------------------------------
History:
Date            Author          Modification
       Latte           created file.
*******************************************************************************/

#include "stdafx.h"
#include <string>
#include <iostream>
using namespace std;

#define MAX 100
string g_strDigit[] = {"零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"};

string g_strUnit[] = {"圆", "拾", "佰", "仟", "万", "拾", "佰", "仟", "亿", 
                      "拾", "佰", "仟", "万", "拾", "佰"};

string g_strUnit2[] = {"角", "分"};

/*******************************************************************************
Func Name       : ReplaceSubStr
Date Created    : 2014-07-03
Author          : Latte
Description     : 将源字符串strOrig中第一个匹配strSub的子串部分替换为strReplace
Input           : 
                  string &strOrig, 
                  string strSub, 
                  string strReplace
Output          : 
                  string &strOrig
Return          : 
                  int
Caution         : 返回值如果为-1，则表示替换失败或未找到替换项
*******************************************************************************/
int ReplaceSubStr(string &strOrig, string strSub, string strReplace)
{
    int pos = (int)strOrig.find(strSub);
    int length = (int)strSub.length();
    
    if (pos >= 0)
    {
        strOrig.replace(pos, length, strReplace);
        return 0;
    }
    
    return -1;
}

/*******************************************************************************
Func Name       : NumToChineseStr
Date Created    : 2014-07-03
Author          : Latte
Description     : 
                  将人民币double数值转化为人民币汉字string
Input           : 
                  double money
Output          : 
Return          : 
                  string
Caution         :
*******************************************************************************/
string NumToChineseStr(double money)
{
    int i               = 0;
    int ret             = 0;
    int length          = 0;
    char *p             = NULL;
    char *pcDecimal     = NULL; //保存小数部分字符
    char czNumber[MAX]  = {0};  //保存完整数字部分字符
    string strResult;

    cout << "======================================" << endl;
    cout << money << endl;

    //判断是否为小数
    if (money < 0)
    {
        strResult = "不支持读负数";   
        return strResult;   
    }

    //将数字转为数字字符串，利用sprintf_s的正则转换
    sprintf_s(czNumber, MAX, "%.15lg", money);
    printf("[No.0]%sn", czNumber); 

    //如果数字是太大或太小的数，因为已经转为科学计数，所以会含有e字符
    p = strchr(czNumber,'e');  
    if (NULL!=p) 
    {
        strResult = "不支持读太大或太小的数";
        return strResult;
    }
    
    p = strchr(czNumber, '.');  
    if (NULL != p) 
    {       
        p[0] = 0;    
        pcDecimal = p + 1;   
    }    
    length = (int)strlen(czNumber);  
    
    for (i = 0; i<length; i++) 
    {        
        if ('0' == czNumber[i] && 0 != ((length-1-i) % 4))
        {
            strResult += g_strDigit[czNumber[i] - '0'];
        } 
        else 
        {
            strResult += g_strDigit[czNumber[i] - '0'] + g_strUnit[length-1-i];
        }   
    }
    cout << "[No.1]把数字直接替换为汉字: n" << strResult << endl;

    //把strResult中的所有"零零"子串替换为"零"
    while (1)
    {
        ret = ReplaceSubStr(strResult, "零零", "零");
        if (ret < 0)
        {
            break;
        }
    }
    cout << "[No.2]替换所有零零为零: n" << strResult << endl;

    ReplaceSubStr(strResult, "零亿", "亿");
    ReplaceSubStr(strResult, "零万", "万");
    if (strResult != "零圆")    //如果整数部分全为0，则不要去除元单位前面的零
    {
        ReplaceSubStr(strResult, "零圆", "圆");
    }
    
    cout << "[No.3]去除零亿、零万、零圆前面的零: n" << strResult << endl;

    //小数精确到两位数，即精确到单位分
    if (NULL != pcDecimal) 
    {
        //如果小数部分有数值而整数部分为0，则删除字符串中的零元
        if (strResult == "零圆")
        {
            strResult.clear();
        }
        i = 0;
        while (1) 
        {           
            if (0 == pcDecimal[i] || i >= 2) 
                break;   
            strResult += g_strDigit[pcDecimal[i] - '0'] + g_strUnit2[i];
            i++;      
        }   
    }
    cout << "[No.4]小数精确到两位数，即精确到单位分: n" << strResult << endl;
    
    return strResult;
}

int main(void)
{
    //cout << "Result: " << NumToChineseStr(0.00) << endl;
    //cout << "Result: " << NumToChineseStr(-345.67) << endl;
    //cout << "Result: " << NumToChineseStr(1000.0) << endl;
    cout << "Result: " << NumToChineseStr(130040600090.012) << endl;

    return 0;
}