#include?????
#include?????
using?namespace?std;????
class?BigFigure{????
????string?num1num2;????
????string?outcome;????
????int?precision;????
????char?operation;????
public:????
????BigFigure（）{????
????????num1=num2=“0“;????
????????outcome=“0“;????
????????precision=5;????
????}????
????string&?plus（string?&?string?&）;????
????string&?subtration（string?&?string?&）;????
????string&?multiplication（string?&?string?&）;????
????string&?division（string?&?string?&）;????
????void?show（）;????
????void?BigFigureInterface（）;????
????string?&revese（string&）;????
????friend?istream&?operator>>（istream&?i?BigFigure&?a）{????
?????????return?i>>a.num1>>a.operation>>a.num2;????
????}????
????~BigFigure（）{?}????
};????
void?BigFigure::show（）{????
????cout<<“Result:?“<}????
void?BigFigure::BigFigureInterface（）{????
????BigFigure?a;????
????cout<<“*********************************************************/n“;????
????cout<<“??????Welcome...?????????????????????????????????????/n“;????
????cout<<“????????????Four?Arithmetic?Operations?of?Big?Figures/n“;????
????cout<<“*********************************************************/n/n“;????
????cout<<“Notes:/n“;????
????cout<<“???????1.?輸入形式為：A[空格或換行]O[空格或換行]B。/n“;????
????cout<<“???????2.?1中A、B為大數(shù)，O為運(yùn)算符（如輸入：123456789?/?432432）。/n“;????
????cout<<“???????3.?既然處理大數(shù)，就沒(méi)必要輸入小數(shù)點(diǎn)位了。/n“;????
????cout<<“???????4.?加減不能處理負(fù)號(hào)，乘除可以。/n“;????
????cout<<“???????5.?用于學(xué)習(xí)交流，若發(fā)現(xiàn)錯(cuò)誤可聯(lián)系519916178@qq.com。/n/n“;????
????cout<<“Now?Start?Input?0?0?0?to?end?if?you?want?to?quit!/n/n“;????
????cout<<“[BigFigure?#]?“;????
????cin>>a;????
????while（a.operation!=‘0‘）{????
????????switch（a.operation）{????
????????????case?‘+‘:?a.plus（a.num1?a.num2）;????
??????????????????????a.show（）;?break;????
????????????case?‘-‘:?a.subtration（a.num1?a.num2）;????
??????????????????????a.show（）;?break;????
????????????case?‘*‘:?a.multiplication（a.num1?a.num2）;????
??????????????????????a.show（）;?break;????
????????????case?‘/‘:?a.division（a.num1?a.num2）;????
??????????????????????a.show（）;?break;????
????????????default:cout<????????}????
????????cout<<“[BigFigure?#]?“;????
????????cin>>a;????
????}????
???//?system（“cls“）;????
????cout<<“/n/n/n/n/n/n/t/t?Quited.../n/n/n/n/n/n/n“;????
????//system（“pause“）;????
}????
????
string&??BigFigure::revese（string&?s）{????
????char?c;????
????int?t=s.size（）;????
????for（int?i=0;?i????????c=s[i];????
????????s[i]=s[t-i-1];????
????????s[t-i-1]=c;????
????}????
????return?s;????
}????
string&?BigFigure::plus（string?&str1?string?&str2）{//加法運(yùn)算，未處理符號(hào)?????
????int?min=0it=0;????
????string?temp;????
????outcome.clear（）;????
????str1=revese（str1）;????
????str2=revese（str2）;????
????min=str1.size（）????for（i=0;?i????????temp+=（str1[i]+str2[i]-96+t）%10+48;????
????????t=（st