大整數類（已完善）

#include#include

#include
#include
#include
#include
using
namespace
std;
#define maxn 9999
#define maxsize 1000
#define dlen 4
class
bignum
//建構函式
bignum(const
int);       //
將乙個int型別的變數轉化為大數
bignum(const
char*);     //
將乙個字串型別的變數轉化為大數
bignum(const bignum &);  //
拷貝建構函式
bignum &operator=(const bignum &);   //
過載賦值運算子，大數之間進行賦值運算
friend istream& operator>>(istream&, bignum&);   //
過載輸入運算子
friend ostream& operator
<<(ostream&, bignum&);   //
過載輸出運算子
bignum 
operator+(const bignum &) const;   //
過載加法運算子，兩個大數之間的相加運算
bignum operator-(const bignum &) const;   //
過載減法運算子，兩個大數之間的相減運算
bignum operator*(const bignum &) const;   //
過載乘法運算子，兩個大數之間的相乘運算
bignum operator/(const
int   &) const;    //
過載除法運算子，大數對乙個整數進行相除運算
bignum 
operator^(const
int  &) const;    //
大數的n次方運算
intoperator%(const
int  &) const;    //
大數對乙個int型別的變數進行取模運算
bool
operator>(const bignum & t)const;   //
大數和另乙個大數的大小比較
bool
operator>(const
int & t)const;      //
大數和乙個int型別的變數的大小比較
void print();       //
輸出大數
};bignum::bignum(
const
int b)     //
將乙個int型別的變數轉化為大數
a[len++] =d;
}bignum::bignum(
const
char*s)     //
將乙個字串型別的變數轉化為大數
}bignum::bignum(
const bignum & t) : len(t.len)  //
拷貝建構函式
bignum & bignum::operator=(const bignum & n)   //
過載賦值運算子，大數之間進行賦值運算
istream& operator>>(istream & in, bignum & b)   //
過載輸入運算子
b.a[count] =sum;
count++;
}b.len = count++;
returnin;
}/*ostream& operator<<(ostream& out,  bignum& b)   //過載輸出運算子
return out;}*/
bignum bignum::
operator+(const bignum & t) const
//兩個大數之間的相加運算
}if (t.a[big] != 0
)        t.len = big + 1
;    
else
t.len =big;
returnt;}
bignum bignum::
operator-(const bignum & t) const
//兩個大數之間的相減運算
else
big =t1.len;
for (i = 0; i < big; i++)
else
t1.a[i] -=t2.a[i];
}t1.len =big;
while (t1.a[len - 1] == 0 && t1.len > 1
)    
if(flag)
t1.a[big - 1] = 0 - t1.a[big - 1
];    
return
t1;}
bignum bignum::
operator*(const bignum & t) const
//兩個大數之間的相乘運算
else
}if (up != 0
)            ret.a[i + j] =up;
}ret.len = i +j;
while (ret.a[ret.len - 1] == 0 && ret.len > 1
)        ret.len--;
return
ret;
}bignum bignum::
operator/(const
int & b) const
//大數對乙個整數進行相除運算
ret.len =len;
while (ret.a[ret.len - 1] == 0 && ret.len > 1
)        ret.len--;
return
ret;
}int bignum::operator %(const
int & b) const
//大數對乙個int型別的變數進行取模運算
returnd;}
bignum bignum::
operator^(const
int & n) const
//大數的n次方運算
m -=i;
ret = ret *t;
if (m == 1
)            ret = ret * (*this
);    }
return
ret;
}bool bignum::operator>(const bignum & t) const
//大數和另乙個大數的大小比較
else
return
false;}
bool bignum::operator >(const
int & t) const
//大數和乙個int型別的變數的大小比較
void bignum::print()    //
輸出大數
//cout << endl;
printf("\n"
);}int main(void) 
cout 
<< ans 
;    }
return0;
}

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分享一下我老師大神的人工智慧教程！零基礎，通俗易懂！include include include include using namespace std define maxn 9999 define maxsize 10 define dlen 4 class bignum 建構函式 bignu...

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