Question

Time.cpp:

#include "Time.h"

#include <iostream>
using namespace std;

Time::Time(string time)
{
   hours = 0;
   minutes = 0;
   isAfternoon = false;

   //check to make sure there are 5 characters
   if (//condition to check if length of string is wrong)
   {
       cout << "You must enter a valid military time in the format 00:00" << endl;
   }
   else
   {
       //check to make sure the colon is in the correct spot
       if ( //condition to check if colon position is wrong)
       {
           cout << "You must enter a valid military time in the format 00:00" << endl;
       }
       //check to make sure all other characters are digits
       else if (//condition to check if first hour character is not a digit)
       {
           cout << "You must enter a valid military time in the format 00:00" << endl;
       }
       else if (//condition to check if second hour character is not a digit)
       {
           cout << "You must enter a valid military time in the format 00:00" << endl;
       }
       else if (//condition to check if first minute character is not a digit)
       {
           cout << "You must enter a valid military time in the format 00:00" << endl;
       }
       else if (//condition to check if second minute character is not a digit)
       {
           cout << "You must enter a valid military time in the format 00:00" << endl;
       }
       else
       {
           /*separate the string into hours and minutes converting them to integers
           and storing them into the instance variables*/
          

           //validate that hours and minutes are valid values
           if (hours > 23)
           {
               cout << "You must enter a valid military time in the format 00:00" << endl;
           }
           else if (minutes > 59)
           {
               cout << "You must enter a valid military time in the format 00:00" << endl;
           }
           //convert military time to conventional time for afternoon times, morning times don't need converting
           else if (hours > 12)
           {
               hours = hours - 12;
               isAfternoon = true;
           }
           //account for noon
           else if (hours == 12)
           {
               isAfternoon = true;
           }
           //account for midnight
           else if (hours == 0)
           {
               hours = 12;
           }

       }
   }
}

Time::Time()
{
   hours = 12;
   minutes = 0;
   isAfternoon = true;
}

ostream& operator<< (ostream& out, Time time)
{
   //write the time in conventional form including am or pm
  
  
  
   return out;
}

---------------

Time.h:

#ifndef TIME_H
#define TIME_H

#include <string>
using namespace std;

class Time
{
   friend ostream& operator<< (ostream& out, Time time);
private:
   int hours;
   int minutes;
   bool isAfternoon;
public:
   Time(string time);
   Time();

};
#endif
----------------

SSN.cpp:

#include <iostream>
using namespace std;

int main()
{
   const int SIZE = 12;
   char ssNum[SIZE];
   bool isValid = true;  

   cout << "Enter a social security number in the format ###-##-####" << endl;
   //this version of getline stores the typed characters into a c-string
   cin.getline(ssNum, SIZE);
   //this is to prove that a c-string ends in
   if (ssNum[SIZE-1] == '\0') cout << "null character" << endl;

   //validate the format to be ###-##-####
  
  
  
  
  
   return 0;
}

-------------------------

1. In the Time.cpp file, add conditions to the decision structure which validates the data. Conditions are needed that will a. Check the length of the string b. Check the position of the colon C. Check that all other characters are digits 2. Add lines that will separate the string into two substrings containing hours and minutes. Convert these substrings to integers and save them into the instance variables. 3. Implement the friend function to overload the operator (prototype is in Time.h and stub is in Time.cpp) that will display the military time as conventional time, e.g. 4:05 pm 4. Create a TimeTester.cpp file to test out your program using the following valid input: 00:00, 12:00, 04:05, 10:15, 23:59, 00:35, and the following invalid input: 7:56, 15:78, 08-60, 24:00, 3e:33, 1:111. 5. In the SSN.cpp file, add a loop to validate each character in the c-string. 6. Inside the loop. add conditions to check for a dash at the correct positions and numbers in the remaining spots. Anything that does not validate correctly should set the flag to false and print out what did not validate correctly (dash, number, etc.). 7. Compile and run with test cases to check each condition.

Answer 1

Please find below the code and output screenshots.

Code for TimeTester.cpp

#include <iostream>

#include "Time.h"

using namespace std;

//function to test valid times

void test_validtime(string time){

    cout <<"\n\nChecking time: "<< time <<"\n";

    Time T1 = Time(time); //create Time class object

    cout << T1; //display valid time in conventional form

}

//function to test invalid times

void test_invalidtime(string time){

    cout <<"\nChecking time: "<< time <<"\n";

    Time T1 = Time(time); //create Time class object

}

int main()

{

    //calling test_validtime() with valid times

   test_validtime("00:00");

test_validtime("12:00");

   test_validtime("04:05");

   test_validtime("10:15");

   test_validtime("23:59");

   test_validtime("00:35");

  

   cout <<"\n";

  

    //calling test_invalidtime() with invalid times

   test_invalidtime("7:56");

   test_invalidtime("15:78");

   test_invalidtime("08:60");

   test_invalidtime("24:00");

   test_invalidtime("3e:33");

   test_invalidtime("1:111");

  

  

   return 0;

}

Code for Time.h

//#ifndef TIME_H

//#define TIME_H

#include <string>

using namespace std;

class Time

{

   friend ostream& operator<< (ostream& out, Time time);

private:

   int hours;

   int minutes;

   bool isAfternoon;

public:

   Time(string time);

   Time();

};

Code for Time.cpp

#include "Time.h"

#include <iostream>

#include <iomanip>

#include <ctype.h>

#include <string.h>

using namespace std;

Time::Time(string time)

{

   hours = 0;

   minutes = 0;

   isAfternoon = false;

   //check to make sure there are 5 characters

   if (time.length() != 5)

   {

       cout << "You must enter a valid military time in the format 00:00" << endl;

   }

   else

   {

       //check to make sure the colon is in the correct spot

       if ( time[2] != ':')

       {

           cout << "You must enter a valid military time in the format 00:00" << endl;

       }

       //check to make sure all other characters are digits

       else if (!isdigit(time[0]))

       {

           cout << "You must enter a valid military time in the format 00:00" << endl;

       }

       else if (!isdigit(time[1]))//condition to check if second hour character is not a digit)

       {

           cout << "You must enter a valid military time in the format 00:00" << endl;

       }

       else if (!isdigit(time[3]))

       {

           cout << "You must enter a valid military time in the format 00:00" << endl;

       }

       else if (!isdigit(time[4]))

       {

           cout << "You must enter a valid military time in the format 00:00" << endl;

       }

       else

       {

           /*separate the string into hours and minutes converting them to integers

           and storing them into the instance variables*/

            hours = stoi(time.substr(0,2));

            minutes = stoi(time.substr(3,5));

           //validate that hours and minutes are valid values

           if (hours > 23)

           {

               cout << "You must enter a valid military time in the format 00:00" << endl;

           }

           else if (minutes > 59)

           {

               cout << "You must enter a valid military time in the format 00:00" << endl;

           }

           //convert military time to conventional time for afternoon times, morning times don't need converting

           else if (hours > 12)

           {

               hours = hours - 12;

               isAfternoon = true;

           }

           //account for noon

           else if (hours == 12)

           {

               isAfternoon = true;

           }

           //account for midnight

           else if (hours == 0)

           {

               hours = 12;

           }

       }

   }

}

Time::Time()

{

   hours = 12;

   minutes = 0;

   isAfternoon = true;

}

ostream& operator<< (ostream& out, Time time)

{

   //write the time in conventional form including am or pm

if(time.hours > 12){

      out <<"Time in conventional form = " <<(time.hours - 12)<<":"<< setw(2) << setfill('0')<<time.minutes<<" ";

} else {

      out <<"Time in conventional form = " <<time.hours<<":"<< setw(2) << setfill('0')<<time.minutes<<" ";

}

if(time.isAfternoon)

    out <<"pm";

else

    out <<"am";

   return out;

}

Output Screenshot:

Checking time: 00:00 Time in conventional form = 12:00 am Checking time: 12:00 Time in conventional form = 12:00 pm Checking time: 04:05 Time in conventional form = 4:05 am Checking time: 10:15 Time in conventional form = 10:15 am Checking time: 23:59 Time in conventional form = 11:59 pm Checking time: 00:35 Time in conventional form = 12:35 am Checking time: 7:56 You must enter a valid military time in the format 00:00 Checking time: 15: 78 You must enter a valid military time in the format 00:00

Checking time: 08:60 You must enter a valid military time in the format 00:00 Checking time: 24:00 You must enter a valid military time in the format 00:00 Checking time: 3e:33 You must enter a valid military time in the format 00:00 Checking time: 1:111 You must enter a valid military time in the format 00:00 ... Program finished with exit code o Press ENTER to exit console. I

SSN.cpp

#include <iostream>

using namespace std;

int main()

{

   const int SIZE = 12;

   char ssNum[SIZE];

   bool isValid = true;

   cout << "Enter a social security number in the format ###-##-####" << endl;

   //this version of getline stores the typed characters into a c-string

   cin.getline(ssNum, SIZE);

   //this is to prove that a c-string ends in

   if (ssNum[SIZE-1] == '\0') cout << "null character" << endl;

   //validate the format to be ###-##-####

   for(int i = 0;i<SIZE-1; i++){

       if(i == 3 || i == 6){

           if(ssNum[i] != '-'){

                isValid = false;

                cout << "Dash validation failed!!!\n";

                break;

           }

       } else{

           if (!isdigit(ssNum[i])){

               isValid = false;

               cout << "Number validation failed!!!\n";

               break;

           }

          

       }

   }

   if(isValid == true)

        cout << "Entered SSN is a valid one!!!";

   return 0;

}

Output: (I have changed the code such that if dash/number validation failed, further characters are not validated. Break the loop immediately. If you don't want that you can remove the break statements)

Screenshots taken brfore adding break statements

Enter a social security number in the format ###-##-#### 912-11-5263 null character Entered SSN is a valid one!!! ... Program finished with exit code o Press ENTER to exit console.

:-## ## Enter a social security_number in the format ### :-# 99-125-9623 null character Number validation failed!!! Dash validation failed!!! ... Program finished with exit code o Press ENTER to exit console.

-## ## Enter a social security number in the format ###-# 123$25-5236 null character Dash validation failed!!! ... Program finished with exit code o Press ENTER to exit console.

Enter a social security number in the format ###-##-#### 52-p86-4523 null character Number validation failed!!! Dash validation failed!!! ... Program finished with exit code o Press ENTER to exit console.