高精度模板

#include 
#include
#include 
#include 
#include 
using namespace std;
unsigned num[10];
struct BigInteger
{
    static const int BASE = 100000000;
    static const int WIDTH = 8;
    vector<int> s;
    BigInteger(long long num = 0){*this = num;}
    BigInteger operator = (long long num)
    {
        s.clear();
        do{
            s.push_back(num%BASE);
            num/=BASE;
        }while(num>0);
        return *this;
    }
    BigInteger operator = (const string& str)
    {
        s.clear();
        int x,len = (str.length()-1)/WIDTH +1;
        for(int i = 0;iint end = str.length()-i*WIDTH;
            int start = max(0,end - WIDTH);
            sscanf(str.substr(start,end-start).c_str(), "%d",&x);
            s.push_back(x);
        }
        return *this;
    }
    BigInteger operator + (const BigInteger& b) const{
        BigInteger c;
        c.s.clear();
        for (int i = 0,g = 0; ; i++) {
            if (g == 0&&i>=s.size()&&i>=b.s.size()) {
                break;
            }
            int x = g;
            if (iif(ireturn c;
    }
    BigInteger operator += (const BigInteger& b)
    {
        *this = *this + b;
        return *this;
    }
    bool operator<(const BigInteger& b)const{
        if(s.size() != b.s.size())
            return s.size()for(int i = s.size()-1;i>=0;i--)
            if(s[i]!=b.s[i]) return s[i]return false;
    }
    bool operator>(const BigInteger& b)const{return b<*this;}
    bool operator<=(const BigInteger& b)const{return !(b<*this);}
    bool operator>=(const BigInteger& b)const{return !(*thisbool operator!=(const BigInteger& b)const{return b<*this||*thisbool operator==(const BigInteger& b)const{return !(b<*this)&&!(*thisoperator << (ostream &out, const BigInteger& x)
{
    out<for (int i = x.s.size()-2; i>=0; i--) {
        char buf[20];
        sprintf(buf, "%08d",x.s[i]);
        for (int j = 0; j<strlen(buf); j++) {
            out<return out;
}
istream& operator >> (istream &in,BigInteger& x)
{
    string s;
    if (!(in>>s)) {
        return in;
    }
    x = s;
    return in;
}