讨厌的大整数加法

#include <iostream> 
#include <cstring> 
#include <cstdlib> 
#include <cstdio> 
using namespace std;
const int MAX = 110;     //终于过了的....
                                  //     要记得判断字符串长度！~
class CHugeInt {
    char p[250];
    
    public:
        CHugeInt(char* s){
            strcpy(p,s);
    
        }
        CHugeInt(int s){
            sprintf(p,"%d",s);
        }
        friend ostream& operator<<(ostream & cout, CHugeInt a){
                 cout<<a.p;
            
            return cout;
           }
    
        CHugeInt  operator+(CHugeInt & b){
          CHugeInt a1(p);
          a1 += b.p;
          return a1;    
        }
        
    friend CHugeInt operator+(int N, CHugeInt& a){
         CHugeInt a1(a.p);
          a1 += N;
          return a1;
        
    }
    
    CHugeInt  operator+(int N){
         CHugeInt a1(p);
          a1 += N;
          return a1;
    }
        
        CHugeInt & operator++(){
          (*this) += 1;
          return*this;
            
        }
        
    friend CHugeInt  operator++(CHugeInt& b,int){
          CHugeInt b1(b.p);
          b += 1;
          return b1;
    }
    
    CHugeInt & operator +=(int N){
        
        char PB[250];
        sprintf(PB,"%d",N);
        char pa[250];
        char pb[250];
        
        if(strlen(p)>=strlen(PB)){
                strcpy(pa,p);
                strcpy(pb,PB);
        }
        else{
               strcpy(pb,p);
                strcpy(pa,PB);
        }
        int  alen=strlen(pa); 
        int  blen=strlen(pb);

          int A,B,j=0;
          char result[250];
          int i,m,n;
          for( i=0,m=alen-1,n=blen-1;n>=0;i++,m--,n--){
              A=pa[m]-'0';
              B=pb[n]-'0';
              if(A+B+j>9){
                  result[i]=A+B-10+j+'0';
                  j=1;
              }
            else{
                result[i]=A+B+j+'0';
                j=0;
           }

          }
          int r;
          for(r=i;m>=0;r++,m--){
              A=pa[m]-'0';
              if(A+j>9){
                  result[r]=A+j-10+'0';
                  j=1;
              }
              else{
                  result[r]=A+j+'0';
                  j=0;
              }
          }
          if(j==1){
              result[r]='1';
              r++;
          }
          result[r]='';
          n=strlen(result);
          for(int i=0,j=n-1;i<j;i++,j--){  
        char c=result[i];  
        result[i]=result[j];  
        result[j]=c;  
    }  
          strcpy(p,result);
          return*this;
    
}
   CHugeInt & operator +=(char* N){
    
        char pb[250];
        char pa[250];
        if(strlen(p)>=strlen(N)){
                strcpy(pa,p);
                strcpy(pb,N);
        }
        else{
               strcpy(pb,p);
                strcpy(pa,N);
        }
    
        int  alen=strlen(pa); 
        int  blen=strlen(pb);

          int A,B,j=0;
          char result[250];
          int i,m,n;
          for( i=0,m=alen-1,n=blen-1;n>=0;i++,m--,n--){
              A=pa[m]-'0';
              B=pb[n]-'0';
              if(A+B+j>9){
                  result[i]=A+B-10+j+'0';
                  j=1;
              }
            else{
                result[i]=A+B+j+'0';
                j=0;
           }

          }
          int r;
          for(r=i;m>=0;r++,m--){
              A=pa[m]-'0';
              if(A+j>9){
                  result[r]=A+j-10+'0';
                  j=1;
              }
              else{
                  result[r]=A+j+'0';
                  j=0;
              }
          }
          if(j==1){
              result[r]='1';
              r++;
          }
          result[r]='';
          n=strlen(result);
          for(int i=0,j=n-1;i<j;i++,j--){  
        char c=result[i];  
        result[i]=result[j];  
        result[j]=c;  
    }  
          strcpy(p,result);
          return*this;
    
}
    
};
int  main() 
{ 
    char s[210];
    int n;

    while (cin >> s >> n) {
        CHugeInt a(s);   //构造函数 1 
        CHugeInt b(n);   //  构造函数 2 

    cout << a + b << endl;  //重载<< 重载+号 1 
    cout << n + a << endl;  //重载+号 2 
    cout << a + n << endl;  //重载+号 3 需要返回对象 
    b += n;   
    cout  << ++ b << endl;   //重载++b 
        cout << b++ << endl;   //重载b++ 
      cout << b << endl;
    }
    return 0;
}

#include <iostream> 
#include <cstring> 
#include <cstdlib> 
#include <cstdio>     //错误原因...偷懒用int 相加...
using namespace std;
const int MAX = 110; 
class CHugeInt {
    char p[250];
    int  p1;
    
    public:
        CHugeInt(){
            p[0]='';
            p1=-1;
        }
        CHugeInt(char* s){
            strcpy(p,s);
            p1=-1;
        }
        CHugeInt(int s){
            p[0]='';
            p1=s;
        }
        friend ostream& operator<<(ostream & cout, CHugeInt a){
            if(a.p1!=-1){
                cout<<a.p1;
            }
            else{
                 cout<<a.p;
            }
            return cout;
           }
    
        CHugeInt  operator+(CHugeInt & b){
          CHugeInt a1(p);
          a1 += b.p1;
          return a1;    
        }
        
    friend CHugeInt operator+(int N, CHugeInt& a){
         CHugeInt a1(a.p);
          a1 += N;
          return a1;
        
    }
    
    CHugeInt  operator+(int N){
         CHugeInt a1(p);
          a1 += N;
          return a1;
    }
        
        CHugeInt & operator++(){
          (*this) += 1;
          return*this;
            
        }
        
    friend CHugeInt  operator++(CHugeInt& b,int){
          CHugeInt b1(b.p1);
          b.p1 += 1;
          return b1;
    }
    
    CHugeInt & operator +=(int N){
        if(p1!=-1){
            p1 += N;
            return *this;
        }
        else{
        
        char pb[10];
        sprintf(pb,"%d",N);
        char pa[250];
        strcpy(pa,p);
        int  alen=strlen(pa); 
        int  blen=strlen(pb);

          int A,B,j=0;
          char result[250];
          int i,m,n;
          for( i=0,m=alen-1,n=blen-1;n>=0;i++,m--,n--){
              A=pa[m]-'0';
              B=pb[n]-'0';
              if(A+B+j>9){
                  result[i]=A+B-10+j+'0';
                  j=1;
              }
            else{
                result[i]=A+B+j+'0';
                j=0;
           }

          }
          int r;
          for(r=i;m>=0;r++,m--){
              A=pa[m]-'0';
              if(A+j>9){
                  result[r]=A+j-10+'0';
                  j=1;
              }
              else{
                  result[r]=A+j+'0';
                  j=0;
              }
          }
          if(j==1){
              result[r]='1';
              r++;
          }
          result[r]='';
          n=strlen(result);
          for(int i=0,j=n-1;i<j;i++,j--){  
        char c=result[i];  
        result[i]=result[j];  
        result[j]=c;  
    }  
          strcpy(p,result);
          return*this;
    }
}
        
    
};
int  main() 
{ 
    char s[210];
    int n;

    while (cin >> s >> n) {
        CHugeInt a(s);   //构造函数 1 
        CHugeInt b(n);   //  构造函数 2 

    cout << a + b << endl;  //重载<< 重载+号 1 
    cout << n + a << endl;  //重载+号 2 
    cout << a + n << endl;  //重载+号 3 需要返回对象 
    b += n;   
    cout  << ++ b << endl;   //重载++b 
        cout << b++ << endl;   //重载b++ 
      cout << b << endl;
    }
    return 0;
}

#include <iostream> 
#include <cstring> 
#include <cstdlib> 
#include <cstdio> 
using namespace std;
const int MAX = 110; 
class CHugeInt {      //将int 相加 全部改成了字符串相加 可是还是不过 TAT   错误原因：字符串长度未预先判断 想当然以为int输入的长度小于字符串
    char p[250];
    
    public:
        CHugeInt(){
            p[0]='';
        
        }
        CHugeInt(char* s){
            strcpy(p,s);
    
        }
        CHugeInt(int s){
            sprintf(p,"%d",s);
        }
        friend ostream& operator<<(ostream & cout, CHugeInt a){
                 cout<<a.p;
            
            return cout;
           }
    
        CHugeInt  operator+(CHugeInt & b){
          CHugeInt a1(p);
          a1 += b.p;
          return a1;    
        }
        
    friend CHugeInt operator+(int N, CHugeInt& a){
         CHugeInt a1(a.p);
          a1 += N;
          return a1;
        
    }
    
    CHugeInt  operator+(int N){
         CHugeInt a1(p);
          a1 += N;
          return a1;
    }
        
        CHugeInt & operator++(){
          (*this) += 1;
          return*this;
            
        }
        
    friend CHugeInt  operator++(CHugeInt& b,int){
          CHugeInt b1(b.p);
          b += 1;
          return b1;
    }
    
    CHugeInt & operator +=(int N){
    

        
        char pb[10];
        sprintf(pb,"%d",N);
        char pa[250];
        strcpy(pa,p);
        int  alen=strlen(pa); 
        int  blen=strlen(pb);

          int A,B,j=0;
          char result[250];
          int i,m,n;
          for( i=0,m=alen-1,n=blen-1;n>=0;i++,m--,n--){
              A=pa[m]-'0';
              B=pb[n]-'0';
              if(A+B+j>9){
                  result[i]=A+B-10+j+'0';
                  j=1;
              }
            else{
                result[i]=A+B+j+'0';
                j=0;
           }

          }
          int r;
          for(r=i;m>=0;r++,m--){
              A=pa[m]-'0';
              if(A+j>9){
                  result[r]=A+j-10+'0';
                  j=1;
              }
              else{
                  result[r]=A+j+'0';
                  j=0;
              }
          }
          if(j==1){
              result[r]='1';
              r++;
          }
          result[r]='';
          n=strlen(result);
          for(int i=0,j=n-1;i<j;i++,j--){  
        char c=result[i];  
        result[i]=result[j];  
        result[j]=c;  
    }  
          strcpy(p,result);
          return*this;
    
}
   CHugeInt & operator +=(char* N){
    

        
        char pb[250];
        char pa[250];
        if(strlen(p)>=strlen(N)){
                strcpy(pa,p);
                strcpy(pb,N);
        }
        else{
               strcpy(pb,p);
                strcpy(pa,N);
        }
    
        int  alen=strlen(pa); 
        int  blen=strlen(pb);

          int A,B,j=0;
          char result[250];
          int i,m,n;
          for( i=0,m=alen-1,n=blen-1;n>=0;i++,m--,n--){
              A=pa[m]-'0';
              B=pb[n]-'0';
              if(A+B+j>9){
                  result[i]=A+B-10+j+'0';
                  j=1;
              }
            else{
                result[i]=A+B+j+'0';
                j=0;
           }

          }
          int r;
          for(r=i;m>=0;r++,m--){
              A=pa[m]-'0';
              if(A+j>9){
                  result[r]=A+j-10+'0';
                  j=1;
              }
              else{
                  result[r]=A+j+'0';
                  j=0;
              }
          }
          if(j==1){
              result[r]='1';
              r++;
          }
          result[r]='';
          n=strlen(result);
          for(int i=0,j=n-1;i<j;i++,j--){  
        char c=result[i];  
        result[i]=result[j];  
        result[j]=c;  
    }  
          strcpy(p,result);
          return*this;
    
}
    
};
int  main() 
{ 
    char s[210];
    int n;

    while (cin >> s >> n) {
        CHugeInt a(s);   //构造函数 1 
        CHugeInt b(n);   //  构造函数 2 

    cout << a + b << endl;  //重载<< 重载+号 1 
    cout << n + a << endl;  //重载+号 2 
    cout << a + n << endl;  //重载+号 3 需要返回对象 
    b += n;   
    cout  << ++ b << endl;   //重载++b 
        cout << b++ << endl;   //重载b++ 
      cout << b << endl;
    }
    return 0;
}