{
if(i
Carry/=Base;
}
R.Len=i;
return R;
}
istream &operator>>(istream &In,BigInt &V)
{
char Ch;
for(V=0; In>>Ch;)
{
V=V*10+(Ch-'0');
if(In.peek()<=' ') break;
}
return In;
}
ostream &operator<<(ostream &Out,const BigInt &V)
{
int i;
Out<<(V.Len==0 0:V[V.Len-1]);
for(i=V.Len-2; i>=0; i--) for(int j=Base/10; j>0; j/=10) Out<
}
int main()
{
BigInt a,b;
cin>>a>>b;
cout<<"+"<
终于写好了哇,我的亲娘来,满满的都是泪啊。。。重载你妹啊。。。。。
- #include
- #include
- using namespace std;
- const int Base=1000000000;
- const int Capacity=100;
- typedef long long huge;
- struct BigInt
- {
- int Len;
- int Data[Capacity];
- BigInt() : Len(0) {}
- BigInt (const BigInt &V) : Len(V.Len)
- {
- memcpy (Data, V.Data, Len*sizeof*Data);
- }
- BigInt(int V) : Len(0)
- {
- for(; V>0; V/=Base) Data[Len++]=V%Base;
- }
- BigInt &operator=(const BigInt &V)
- {
- Len=V.Len;
- memcpy(Data, V.Data, Len*sizeof*Data);
- return *this;
- }
- int &operator[] (int Index)
- {
- return Data[Index];
- }
- int operator[] (int Index) const
- {
- return Data[Index];
- }
- };
- int compare(const BigInt &A, const BigInt &B)
- {
- if(A.Len!=B.Len) return A.Len>B.Len 1:-1;
- int i;
- for(i=A.Len-1; i>=0 && A[i]==B[i]; i--);
- if(i<0)return 0;
- return A[i]>B[i] 1:-1;
- }
- BigInt operator + (const BigInt &A,const BigInt &B)
- {
- int i,Carry(0);
- BigInt R;
- for(i=0; i
0; i++) - {
- if(i
- if(i
- R[i]=Carry%Base;
- Carry/=Base;
- }
- R.Len=i;
- return R;
- }
- BigInt operator - (const BigInt &A,const BigInt &B)
- {
- int i,Carry(0);
- BigInt R;
- R.Len=A.Len;
- for(i=0; i
- {
- R[i]=A[i]-Carry;
- if(i
- if(R[i]<0) Carry=1,R[i]+=Base;
- else Carry=0;
- }
- while(R.Len>0&&R[R.Len-1]==0) R.Len--;
- return R;
- }
- BigInt operator * (const BigInt &A,const BigInt &B)
- {
- int i;
- huge Carry(0);
- BigInt R;
- for(i=0; i
0; i++) - {
- if(i
- R[i]=Carry%Base;
- Carry/=Base;
- }
- R.Len=i;
- return R;
- }
- istream &operator>>(istream &In,BigInt &V)
- {
- char Ch;
- for(V=0; In>>Ch;)
- {
- V=V*10+(Ch-'0');
- if(In.peek()<=' ') break;
- }
- return In;
- }
- ostream &operator<<(ostream &Out,const BigInt &V)
- {
- int i;
- Out<<(V.Len==0 0:V[V.Len-1]);
- for(i=V.Len-2; i>=0; i--) for(int j=Base/10; j>0; j/=10) Out<
- return Out;
- }
- int main()
- {
- BigInt a,b;
- cin>>a>>b;
- cout<<"+"<
- cout<
- if(compare(a, b)>0) cout<<"-"<
- else cout<<"-"<
- cout<<"*"<
- }