银行数字转文字

print(IntToString(123456789)); //一亿二千三百四十五万六千七百八十九
print(IntToString(1234567809)); //一十二亿三千四百五十六万七千八百零九
print(IntToString(1234567890)); //一十二亿三千四百五十六万七千八百九十
print(IntToString(1234560090)); //一十二亿三千四百五十六万零九十
print(IntToString(1234500009)); //一十二亿三千四百五十万零九
print(IntToString(1204500109)); //一十二亿零四百五十万零一百零九
print(IntToString(120450010912045001)); //一十二亿零四百五十万零一百零九亿一千二百零四万五千零一

std::string IntToString(uint64_t num) {