C++-阿拉伯数字转化为中⽂表⽰1、代码摘⾃《算法的乐趣》// chinese_num.cpp : Defines the entry point for the console application.//#include <string>#include <cassert>//using namespace std;const int CHN_NUM_CHAR_COUNT = 10;const int CHN_CHAR_LENGTH = 2;const char *chnNumChar[CHN_NUM_CHAR_COUNT] = { "零", "⼀", "⼆", "三", "四", "五", "六", "七", "⼋", "九" };const char *chnUnitChar[] = { "", "⼗", "百", "千" };const char *chnUnitSection[] = { "", "万", "亿", "万亿" };typedef struct{const char *name; //中⽂权位名称int value; //10的倍数值bool secUnit; //是否是节权位}CHN_NAME_VALUE;CHN_NAME_VALUE chnValuePair[] ={{ "⼗", 10, false }, { "百", 100, false }, { "千", 1000, false },{ "万", 10000, true }, { "亿", 100000000, true }};void SectionToChinese(unsigned int section, std::string& chnStr){chnStr.clear();std::string strIns;int unitPos = 0;bool zero = true;while(section > 0){int v = section % 10;if(v == 0){if( (section == 0) || !zero ){zero = true; /*需要补0，zero的作⽤是确保对连续的多个0，只补⼀个中⽂零*/chnStr.insert(0, chnNumChar[v]);}}else{zero = false; //⾄少有⼀个数字不是0strIns = chnNumChar[v]; //此位对应的中⽂数字strIns += chnUnitChar[unitPos]; //此位对应的中⽂权位chnStr.insert(0, strIns);}unitPos++; //移位section = section / 10;}}//num == 0需要特殊处理，直接返回"零"void NumberToChinese(unsigned int num, std::string& chnStr){chnStr.clear();int unitPos = 0;std::string strIns;bool needZero = false;if(num == 0){chnStr = chnNumChar[0];return;}while(num > 0){unsigned int section = num % 10000;if(needZero){chnStr.insert(0, chnNumChar[0]);}SectionToChinese(section, strIns);/*是否需要节权位？*/strIns += (section != 0) ? chnUnitSection[unitPos] : chnUnitSection[0];chnStr.insert(0, strIns);/*千位是0？需要在下⼀个section补零*/needZero = (section < 1000) && (section > 0);num = num / 10000;unitPos++;}}int ChineseToValue(const std::string& chnStr){for(int val = 0; val < sizeof(chnNumChar) / sizeof(chnNumChar[0]); val++){if(pare(chnNumChar[val]) == 0){return val;}}return -1;}int ChineseToUnit(const std::string& chnStr, bool& secUnit){for(int unit = 0; unit < sizeof(chnValuePair) / sizeof(chnValuePair[0]); unit++){if(pare(chnValuePair[unit].name) == 0){secUnit = chnValuePair[unit].secUnit;return chnValuePair[unit].value;}}return1;}unsigned int ChineseToNumber(const std::string& chnString){unsigned int rtn = 0;unsigned int section = 0;int number = 0;bool secUnit = false;std::string::size_type pos = 0;while(pos < chnString.length()){int num = ChineseToValue(chnString.substr(pos, CHN_CHAR_LENGTH));if(num >= 0) /*数字还是单位？*/{number = num;pos += CHN_CHAR_LENGTH;if(pos >= chnString.length())//如果是最后⼀位数字，直接结束{section += number;rtn += section;break;}}else{int unit = ChineseToUnit(chnString.substr(pos, CHN_CHAR_LENGTH), secUnit);if(secUnit)//是节权位说明⼀个节已经结束{section = (section + number) * unit;rtn += section;section = 0;}else{section += (number * unit);}number = 0;pos += CHN_CHAR_LENGTH;if(pos >= chnString.length()){rtn += section;break;}}}return rtn;}typedef struct{int num;const char *chnNumStr;}TEST_DATA;TEST_DATA testPair[] ={{0, "零"},{1, "⼀"},{2, "⼆"},{3, "三"},{4, "四"},{5, "五"},{6, "六"},{7, "七"},{8, "⼋"},{9, "九"},{10, "⼀⼗"},{11, "⼀⼗⼀"},{110, "⼀百⼀⼗"},{111, "⼀百⼀⼗⼀"},{100, "⼀百"},{102, "⼀百零⼆"},{1020, "⼀千零⼆⼗"},{1001, "⼀千零⼀"},{1015, "⼀千零⼀⼗五"},{1000, "⼀千"},{10000, "⼀万"},{20010, "⼆万零⼀⼗"},{20001, "⼆万零⼀"},{100000, "⼀⼗万"},{1000000, "⼀百万"},{10000000, "⼀千万"},{100000000, "⼀亿"},{1000000000, "⼀⼗亿"},{1000001000, "⼀⼗亿⼀千"},{1000000100, "⼀⼗亿零⼀百"},{200010, "⼆⼗万零⼀⼗"},{2000105, "⼆百万零⼀百零五"},{20001007, "⼆千万⼀千零七"},{2000100190, "⼆⼗亿零⼀⼗万零⼀百九⼗"},{1040010000, "⼀⼗亿四千零⼀万"},{200012301, "⼆亿零⼀万⼆千三百零⼀"},{2005010010, "⼆⼗亿零五百零⼀万零⼀⼗"},{4009060200, "四⼗亿零九百零六万零⼆百"},{4294967295, "四⼗⼆亿九千四百九⼗六万七千⼆百九⼗五"} };void testNumberToChinese(){std::string chnNum;for(int i = 0; i < sizeof(testPair)/sizeof(testPair[0]); i++){NumberToChinese(testPair[i].num, chnNum);assert(strcmp(chnNum.c_str(), testPair[i].chnNumStr) == 0); }}void testChineseToNumber(){for(int i = 0; i < sizeof(testPair)/sizeof(testPair[0]); i++){unsigned int num = ChineseToNumber(testPair[i].chnNumStr); assert(num == testPair[i].num);}}int main(int argc, char* argv[]){testNumberToChinese();testChineseToNumber();return0;}。
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