計程HW6

[microball (pursue the poem)]

<6-6>

#include <iostream>
using std::cout;
using std::cin;
using std::endl;
#include <cstdlib>
#include <ctime>

template <class T> class complex{
public:
        complex(T = 0, T = 0);
        void addition(const complex<T> &, const complex<T> &);
        void subtraction(const complex<T> &, const complex<T> &);
        void print();
private:
        double real,imagine;
};

template <class T> complex<T>::complex(T r, T i) {
        real = r;
        imagine = i;
}

template <class T> void complex<T>::print(){
        cout << "(" << real << "," << imagine << ")" << endl;
}

template <class T> void complex<T>::addition(const complex<T> &a, const complex<T> &b){
        real= a.real + b.real;
        imagine= a.imagine + b.imagine;
        print();
}

template <class T> void complex<T>::subtraction(const complex<T> &a, const complex<T> &b){
        real= a.real - b.real;
        imagine= a.imagine - b.imagine;
        print();
}


int main()
{
        srand((unsigned)time(NULL));
        complex<double> a(-10000 + rand() % 20000, -10000 + rand() % 20000),
                                    b(-10000 + rand() % 20000, -10000 + rand() % 20000), n;
        a.print();
        b.print();
        cout<<"key in 1 for Addtion, 2 for Subtraction.";

        int s;
        cin>>s;
        if (s==1) n.addition(a, b);
        if (s==2) n.subtraction(a, b);

        return 0;
}



<6-8>

#include <iostream>
using std::cout;
using std::cin;
#include <stdio.h>

class Time {
public:
        Time(int =0, int =0, int=0);

        void settime(int,int,int);
        void sethour(int);
        void setminute(int);
        void setsecond(int);

        int gethour();
        int getminute();
        int getsecond();

        void tick();
        void print();

private:
        int hour,minute,second;
};


Time::Time(int hr, int min, int sec)
{settime(hr,min,sec); }

void Time::settime(int h, int m, int s)
{
        sethour(h);
        setminute(m);
        setsecond(s);
}

void Time::sethour(int h)
{hour=( h>=0 && h<24 )? h:0;}
void Time::setminute(int m)
{minute=( m>=0 && m<60 )? m:0;}
void Time::setsecond(int s)
{second=( s>=0 && s<60 )? s:0;}

int Time::gethour(){return hour;}
int Time::getminute(){return minute;}
int Time::getsecond(){return second;}
void Time::print()
{
        cout<<(hour<10? "0" : "") << hour << ":"
                <<(minute<10? "0" : "" ) << minute << ":"
                <<(second<10? "0" : "")<< second ;
}

void Time::tick ()
{
        for(int i=0,count=15 ; i<=count ; i++){
                setsecond((getsecond()+1) %60);
                if (getsecond()==0)
                        setminute((getminute()+1) %60);
                if (getminute()==0 && getsecond()==0)
                        sethour((gethour()+1) % 24);
            print();
                cin.get();
        }
}


int main()
{
        cout<<"Press Enter to increment each second,\n";

        Time t;
        t.sethour(23);
        t.setminute(59);
        t.setsecond(55);

        t.tick();
        return 0;
}



--
天下最難的事，就是享受最簡單平凡的日子
    而最簡單平凡的日子，往往是天下最單純的幸福

--
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