}
        else
        {
            for(int i=m-1; i<12; i++)
            {
                if(n-month[i]<0)
                {
                    d+=n;
                    cout<<"加上"<<dd<<"天后的日期为：";
                    cout<<y<<" "<<m<<" "<<d<<endl;
                    break;
                }
                else
                {
                    n-=month[i];
                    m+=1;
                }
            }
        }
    }
    else if(n>t2)//加上n天后不在本年
    {
        int flag=0;
        y+=1;//将日期转为下一年的1月1日
        m=1;
        d=1;
        n=n-t2-1;
        if(n==0)
        {
            cout<<"加上"<<dd<<"天后的日期为：";
            cout<<y<<" "<<m<<" "<<d<<endl;
        }
        else
        {
            for(int j=y; n!=0; j++)
            {
                if(flag==1)
                    break;
                int t=0;
                if(y%4==0&&y%100!=0||y%400==0)//若当前年为闰年
                {
                    t=n-366;
                    month[1]=29;
                }
                else
                {
                    t=n-365;
                    month[1]=28;
                }
                if(t<=0)//日期在当前年
                {
                    for(int i=m-1; i<12; i++)
                    {
                        if(n-month[i]<0)
                        {
                            d+=n;
                            cout<<"加上"<<dd<<"天后的日期为：";
                            cout<<y<<" "<<m<<" "<<d<<endl;
                            flag=1;
                            break;
                        }
                        else
                        {
                            n-=month[i];
                            m+=1;
                        }
                    }
                }
                else//日期不在本年
                {
                    n=t;
                    y+=1;
                }
            }
        }
    }
}

int main()
{
    int y1,y2,m1,m2,d1,d2,op,n;
    cout<<"请输入所需要的功能：1、计算两个日期的间隔。2、计算一个日期加上一百天后的结果。"<<endl;
    cin>>op;
    if(op==1)//计算两个日期的间隔
    {
        cout<<"请输入第一个日期："<<endl;
        cin>>y1>>m1>>d1;
        cout<<"请输入第二个日期："<<endl;
        cin>>y2>>m2>>d2;

        int t1=Getdays(y1,m1,d1);
        int t2=Getdays(y2,m2,d2);
        if(t1>t2)
            cout<<t1-t2<<endl;
        else
            cout<<t2-t1<<endl;
    }
    else if(op==2)//计算一个日期加上一百天后的结果
    {
        cout<<"请输入日期："<<endl;
        cin>>y1>>m1>>d1;