Question

1
Write a program to convert the time from 24-hour notation to 12-hour notation and vice versa. Your program must be menu driven, giving the user the choice of converting the time between the two notations. Furthermore, your program must contain at least the following functions:

a function to convert the time from 24-hour notation to 12-hour notation,

a function to convert the time from 12-hour notation to 24-hour notation,

a function to display the choices, function(s) to get the input, and function(s) to display the results. (For 12-hour time notation, your program must display AM or PM.)

2

Write a function that takes as a parameter an integer (as a long long value) and returns the number of odd, even, and zero digits

Note:

Note write c++ program for the above question using functions do display the output the program should work for each and every operation do share the screenshot for each and every choice and input operation as described in the question

do attempt both the question as they are on the same topic functions

Answer 1

Given below is the code for the question. Please do rate the answer if it helped. Thank you.

Answer 1:
=========

#include <iostream>
#include <string>
using namespace std;

void convertTo24Hr(int h_in, int m_in, string ampm, int &h_out, int &m_out);
void convertTo12Hr(int h_in, int m_in, int &h_out, int &m_out, string &ampm);
void display(string message, int h, int m, string ampm = "");
int menu();

int main(){
   int choice;
   int h_in, h_out, m_in, m_out;
   string ampm;
   char colon;
  
   while((choice = menu()) != 3){
       switch(choice){
           case 1:
               cout << "Enter the time in 24-hour format (hh:mm): ";
               cin >> h_in >> colon >> m_in;
               convertTo12Hr(h_in, m_in, h_out, m_out, ampm);
               display("The time in 12-hour format is ", h_out, m_out, ampm);
               break;
           case 2:
               cout << "Enter the time in 12-hour format (hh:mm am/pm): ";
               cin >> h_in >> colon >> m_in >> ampm;
               convertTo24Hr(h_in, m_in, ampm, h_out, m_out);
               display("The time in 24-hour format is ", h_out, m_out);
               break;
       }
   }
   return 0;
}

void convertTo24Hr(int h_in, int m_in, string ampm, int &h_out, int &m_out){
   h_out = h_in;
   m_out = m_in;
  
   if(ampm == "pm" || ampm == "PM")
       h_out += 12;
}

void convertTo12Hr(int h_in, int m_in, int &h_out, int &m_out, string &ampm){
   h_out = h_in;
   m_out = m_in;
   ampm = "AM";
   if(h_out > 12){
       h_out = h_out - 12;
       ampm = "PM";
   }
   else if(h_out == 12)
       ampm = "PM";
}

void display(string message, int h, int m, string ampm){
   cout << message;
   if(h < 10)
       cout << "0";
   cout << h << ":";
   if(m < 10)
       cout << "0";
   cout << m;
  
   if(ampm != "")
       cout << " " << ampm;
   cout << endl;
}
int menu(){
   int choice;
   do{
       cout << "1. Convert from 24-hour to 12-hour notation" << endl;
       cout << "2. Convert from 12-hour to 24-hour notation" << endl;
       cout << "3. Exit" << endl;
       cout << "Enter your choice: ";
       cin >> choice;
   }while(choice < 1 || choice > 3);
}

output
====
1. Convert from 24-hour to 12-hour notation
2. Convert from 12-hour to 24-hour notation
3. Exit
Enter your choice: 1
Enter the time in 24-hour format (hh:mm): 14:30
The time in 12-hour format is 02:30 PM
1. Convert from 24-hour to 12-hour notation
2. Convert from 12-hour to 24-hour notation
3. Exit
Enter your choice: 2
Enter the time in 12-hour format (hh:mm am/pm): 5:45 pm
The time in 24-hour format is 17:45
1. Convert from 24-hour to 12-hour notation
2. Convert from 12-hour to 24-hour notation
3. ExitEnter your choice: 3

Answer 2
========
#include <iostream>
#include <string>
using namespace std;
void countDigits(long long num, int &odd, int &even, int &zero);
int main(){
   long long num;
   int odd, even, zero;
  
   cout << "Enter a number: ";
   cin >> num;
   countDigits(num, odd, even, zero);
   cout << "No. of odd digits: " << odd << endl;
   cout << "No. of even digits: " << even << endl;
   cout << "No. of zeros: " << zero << endl;
   return 0;
}

void countDigits(long long num, int &odd, int &even, int &zero){
   int rem;
   odd = 0;
   even = 0;
   zero = 0;
   while(num != 0){
       rem = num % 10;
       if(rem == 0)
           zero++;
       else if(rem % 2 == 0)
           even++;
       else if(rem % 2 == 1)
           odd++;
       num = num / 10;
   }
}

output
-------
Enter a number: 1230450
No. of odd digits: 3
No. of even digits: 2
No. of zeros: 2