Question

In this program, you will be using C++ programming constructs, such as overloaded functions.

Write a program that requests 3 integers from the user and displays the largest one entered. Your program will then request 3 characters from the user and display the largest character entered. If the user enters a non-alphabetic character, your program will display an error message.

You must fill in the body of main() to prompt the user for input, and call the overloaded function showBiggest() twice to display the results of the integer values as well as the character values.

showBiggest

Note that the function to display the largest integer has been written. You must write the function to display the largest character. This function considers uppercase letters to be "bigger" than lowercase letters. Note: your program needs to handle the fact that the ASCII values for uppercase are lower than those for lowercase. And finally, this function displays an error message if any of the characters is not alphabetic.

Input Validation

1. For the purposes of this program, it is OK to assume the user enters valid integers for the first 3 inputs.
2. For the 3 character inputs, display an error message if the user enters anything other than an alphabetic character for any of the 3 characters.

Hints

1. Use functions from the library, such as isupper, islower, isalpha.
2. Keep in mind that the numeric ASCII values for uppercase characters are lower than those for lowercase characters, and make sure your program handles this.
3. Don't forget to add comments to explain what the code is doing and where control of the program is executing.
4. Choose variable names and function names that describe the purpose of the variable.

Sample Output

Please enter 3 integers: 89 33 210

The biggest number from the set (89, 33, 210) is 210

Please enter 3 characters: c F z

The biggest character from the set (c, F, z) is F

Please enter 3 integers: 2 3 4

The biggest number from the set (2, 3, 4) is 4

Please enter 3 characters: U 4 e

All characters must be alphabetic

Answer 1

Program code to copy:-

#include <iostream>

using namespace std;

//Function to accept three integer as parameter and prints
//the largest integer
void showBiggest(int n1, int n2, int n3)
{
   //Assuming first integer as biggest integer
   int biggest = n1;
  
   //Comparing second integer with biggest integer
   if(n2>biggest)
       biggest = n2;
   //Comparing third integer with biggest integer
   if(n3>biggest)
       biggest = n3;
      
   //Printing biggest integer
   cout << biggest << endl;
}

//Function to accept three character as parameter and prints
//the largest charcater.
//This function considers uppercase letters to be "bigger" than lowercase letters.
void showBiggest(char c1, char c2, char c3)
{  
   //Assuming first character as biggest character
   char biggest = c1;
  
   //Checking second character with biggest character.
   if(isupper(c2) && isupper(biggest))
   {
       //When both characters are in upper case then no handling is required
       if(c2>biggest)
           biggest = c2;
   }
   else
       if(islower(c2) && islower(biggest))
       {
           //When both characters are in lower case then no handling is required
           if(c2>biggest)
               biggest = c2;
       }
       else
           //When one characters is in lower case and other character is in upper case
           //then considering uppercase letters are "bigger" than lowercase letters.
           if(c2<biggest)
               biggest = c2;

   //Checking third character with biggest character
   if(isupper(c3) && isupper(biggest))
   {
       //When both characters are in upper case then no handling is required
       if(c3>biggest)
           biggest = c3;
   }
   else
       if(islower(c3) && islower(biggest))
       {
           //When both characters are in lower case then no handling is required
           if(c3>biggest)
               biggest = c3;
       }
       else
          //When one characters is in lower case and other character is in upper case
           //then considering uppercase letters are "bigger" than lowercase letters.
           if(c3<biggest)
               biggest = c3;

   //Printing biggest integer
   cout << biggest << endl;
}

int main()
{
   int num1, num2, num3;
   char ch1, ch2, ch3;
  
   //Prompt and read three integers from user
   cout << "Please enter 3 integers: ";
   cin >> num1 >> num2 >> num3;
  
   cout << "The biggest number from the set ("
   << num1 << "," << num2 << "," << num3 << ") is ";
   //calling function to print biggest integer
   showBiggest(num1, num2, num3);
  
   //Prompt and read three characters from user
   cout << "Please enter 3 characters: ";
   cin >> ch1 >> ch2 >> ch3;
  
   //Checking the input for validation
   if(isalpha(ch1) && isalpha(ch2) && isalpha(ch3))
   {
       cout << "The biggest character from the set ("
   << ch1 << "," << ch2 << "," << ch3 << ") is ";
     
   //Calling function to print biggest character
   showBiggest(ch1, ch2, ch3);
   }
      
   else
       cout << "All characters must be alphabetic" << endl;
  
   return 0;
}

Screenshot of output:-