C++ 基础编程之十进制转换为任意进制及操作符重载

#include<iostream> #include<vector> #include<limits> using namespace std; using std::iterator; ///<summary> ///十进制转换为任意进制，为了熟悉操作符，也加了操作符重载。 ///包括自增（++），运算符重（+），赋值函数重载（=）,输出符（<<） ///</summary> class TenToAny {   vector<char> value;   long long _n;   long long _x; public:   TenToAny():_n(10),_x(0)   {      }   void Switch()   {     try     {       int x=_x, n=_n;       char flag=' ';       if(x>LONG_MAX||x<LONG_MIN)         throw "溢出";       if(x<0)       {         flag='-';         x=-x;       }            while(x!=0)       {         long long remain = x%n;          x = x/n;              if(remain>=10)           remain = 'A'+ remain % 10;         else            remain +='0';         value.push_back(remain);       }       vector<char>::reverse_iterator v= value.rbegin();       while(*v=='0')         value.pop_back();       if(flag=='-')         value.push_back(flag);     }     catch(char *e)     {       cout<<e<<endl;     }   }   TenToAny(long long n,long long x)   {     _n=n;     _x=x;     Switch();   }   TenToAny &operator = (const TenToAny &num)   {     if(this==&num)       return *this;     value=num.value;     _n=num._n;     _x=num._x;     return *this;   }   TenToAny operator +(const TenToAny &num1)   {     TenToAny num;     num._x=num1._x + _x;     num._n=num1._n;     num.Switch();     return num;   }   TenToAny &operator ++()//前置++   {     _x++;     value.clear();     this->Switch();     return *this;   }   TenToAny &operator ++(int)//后置++   {     TenToAny *temp=new TenToAny(this->_n,this->_x);     _x++;     value.clear();     this->Switch();     return *temp;   }   friend ostream &operator <<(ostream &out,TenToAny num);     }; ostream &operator <<(ostream &out,TenToAny num) {   vector<char> value =num.value;   vector<char>::reverse_iterator v= value.rbegin();   for(;v!=value.rend();v++)   {     out<<*v;   }   return out; } int main() {   TenToAny num(19,111);   TenToAny copy(19,222);   TenToAny sum;   sum =num+copy;   cout<<num<<endl;   cout<<copy<<endl;    cout<<copy++<<endl;    cout<<(++copy)<<endl;    return 0; }