Question

1. Please read and understand the following program code. Use it to answer the following 4 questions.

#include <iostream>

#include <string>

#include <sstream>

using namespace std;

class timeStamp // uses 24-hour times (0..24)

{

public:

    timeStamp(void);

    timeStamp(int, int, int);

    void setTime(int, int, int);

    timeStamp *addTimes(timeStamp *);

    timeStamp *subTimes(timeStamp *);

    string toString(void);

    int hour;

    int minute;

    int second;

};

int main()

{

    timeStamp noon(12, 0, 0);

    timeStamp *teaTime = new timeStamp(51, 35, 9);

    cout << "noon = " << noon.toString() << endl;

    cout << "teaTime = " << teaTime->toString() << endl;

    cout << "Time sum = "

         << (noon.addTimes(teaTime))->toString() << endl;

    cout << "Another sum = "

        << (teaTime->subTimes(&noon)).toString() << endl;

    return 0;

}

timeStamp::timeStamp(void)

{

    hour = 0;

    minute = 0;

    second = 0;

}

timeStamp::timeStamp(int h, int m, int s)

{

    hour = h;

    minute = m;

    second = s;

}

void timeStamp::setTime(int h, int m, int s)

{

    hour = s;

    minute = m;

    second = s;

}

timeStamp *timeStamp::addTimes(timeStamp *ts)

{

    int ourTime = (hour * 3600) + (minute * 60) + second;

    int theirTime = (ts->hour * 3600) + (ts->minute * 60) + ts->second;

    int timeSum = (ourTime + theirTime);

    timeStamp *newTime = new timeStamp();

    newTime->hour = timeSum / 3600;

    newTime->minute = (timeSum % 3600) / 60;

    newTime->second = ((timeSum % 3600) % 60);

    return newTime;

}

timeStamp *timeStamp::subTimes(timeStamp *ts)

{

    int ourTime = (hour * 3600) + (minute * 60) + second;

    int theirTime = (ts->hour * 3600) + (ts->minute * 60) + ts->second;

    int timeSum = (ourTime - theirTime);

    timeStamp *newTime = new timeStamp();

    newTime->hour = timeSum / 3600;

    newTime->minute = (timeSum % 3600) / 60;

    newTime->second = ((timeSum % 3600) % 60);

    return newTime;

}

string timeStamp::toString(void)

{

    ostringstream convert;

    convert << "hour = " << hour << ", minute = " << minute

            << ", second = " << second;

    return convert.str();

}

There are two changes needed to this program to make it compile & build correctly. Please be careful and don’t go changing things all over the place.

1. Please show the exact output from the 1^stcout statement in main.

2. Please show the exact output from the 2^ndcout statement in main

3. Please show the exact output from the 3^rdcout statement in main

4. Please show the exact output from the 4^thcout statement in main

Answer 1

Please show the exact output from the 1^stcout statement in main

noon = hour = 12, minute = 0, second = 0

Explanation:Since we created the noon object " timeStamp noon(12, 0, 0);" the above output will be printed

Please show the exact output from the 2^ndcout statement in main

teaTime = hour = 3, minute = 35, second = 9

Explanation:Since 0..24 is allowed for Hours we divide it by 24

Please show the exact output from the 3^rdcout statement in main

Time sum = hour = 15, minute = 35, second = 9

Explanation:We now added noon and teaTime 15 hours(12+3) ,35 minute(0+35), 9 second(0+9)

Please show the exact output from the 4^thcout statement in maiN

AAnother sum = hour = 8, minute = 24, second = 51

2.OUTPUT :

3.CODE :

#include <iostream>

#include <string>

#include <sstream>

using namespace std;

class timeStamp // uses 24-hour times (0..24)

{

public:

    timeStamp(void);

    timeStamp(int, int, int);

    void setTime(int, int, int);

    timeStamp *addTimes(timeStamp *);

    timeStamp *subTimes(timeStamp *);

    string toString(void);

    int hour;

    int minute;

    int second;

};

int main()

{

    timeStamp noon(12, 0, 0);

    timeStamp *teaTime = new timeStamp(51, 35, 9);

    cout << "noon = " << noon.toString() << endl;

    cout << "teaTime = " << teaTime->toString() << endl;

    cout << "Time sum = "

         << (noon.addTimes(teaTime))->toString() << endl;

    cout << "Another sum = "

        << (teaTime->subTimes(&noon))->toString() << endl;

    return 0;

}

timeStamp::timeStamp(void)

{

    hour = 0;

    minute = 0;

    second = 0;

}

timeStamp::timeStamp(int h, int m, int s)

{

    hour = h%24;

    minute = m;

    second = s;

}

void timeStamp::setTime(int h, int m, int s)

{

    hour = h;

    minute = m;

    second = s;

}

timeStamp *timeStamp::addTimes(timeStamp *ts)

{

    int ourTime = (hour * 3600) + (minute * 60) + second;

    int theirTime = (ts->hour * 3600) + (ts->minute * 60) + ts->second;

    int timeSum = (ourTime + theirTime);

    timeStamp *newTime = new timeStamp();

    newTime->hour = (timeSum / 3600)%24;

    newTime->minute = (timeSum % 3600) / 60;

    newTime->second = ((timeSum % 3600) % 60);

    return newTime;

}

timeStamp *timeStamp::subTimes(timeStamp *ts)

{

    int ourTime = (hour * 3600) + (minute * 60) + second;

    int theirTime = (ts->hour * 3600) + (ts->minute * 60) + ts->second;

    int timeSum = (ourTime - theirTime);
        if(timeSum<0)
                timeSum=-(timeSum);

    timeStamp *newTime = new timeStamp();

    newTime->hour = (timeSum / 3600)%24;

    newTime->minute = (timeSum % 3600) / 60;

    newTime->second = ((timeSum % 3600) % 60);

    return newTime;

}

string timeStamp::toString(void)

{

    ostringstream convert;

    convert << "hour = " << hour << ", minute = " << minute

            << ", second = " << second;

    return convert.str();

}