Question

Instructions (In C++ Please)

Verification

This programming lab makes use of an array of characters. The program will validate the characters in the array to see if they meets a set of requirements.

Requirements:

Must be at least 6 characters long (but not limited to 6, can be greater)

Contains one upper case letter

Contains one lower case letter

Contains one digit

Complete the code attached. Must use pointer while checking the characters.

Download Source Lab 3 File:

#include using namespace std;

// Global constants const int SIZE = 80;

// The maximum size of the array const int MIN = 6;

// The minimum number characters

// Function prototypes void displayRequirements();

void displayResult(char[]);

int main()

{

char cstring[SIZE];

displayRequirements();

cout << "Enter a password: ";

cin.getline(cstring, SIZE);

displayResult(cstring);

return 0;

}

void displayRequirements()

{

// Display the password requirements.

cout << "Password Requirments:\n"

<< " - The password should be at least "

<< MIN << " characters long.\n"

<< " - The password should contain at least one uppercase\n"

<< " and at least one lowercase letter.\n"

<< " - The password should have at least one digit.\n\n";

}

void displayResult(char str[])

{

bool length, upper, lower, digit;

length = upper = lower = digit = false;

int lengthCount = 0;

}

Answer 1

The completed C++ code is provided below, please comment if any doubts:

Note: The given code is completed below, the added portion is highlighted

C++ Code:

#include<iostream>
using namespace std;

// Global constants
const int SIZE = 80;

// The maximum size of the array
const int MIN = 6;

// The minimum number characters

// Function prototypes
void displayRequirements();
void displayResult(char[]);

int main()

{

   char cstring[SIZE];
   displayRequirements();
   cout << "Enter a password: ";
   cin.getline(cstring, SIZE);
   displayResult(cstring);
   return 0;
}
void displayRequirements()
{

   // Display the password requirements.

   cout << "Password Requirments:\n"

   << " - The password should be at least "

   << MIN << " characters long.\n"

   << " - The password should contain at least one uppercase\n"

   << " and at least one lowercase letter.\n"

   << " - The password should have at least one digit.\n\n";

}

void displayResult(char str[])

{
   bool length, upper, lower, digit;
   length = upper = lower = digit = false;
   int lengthCount = 0;
   char *pw = str;

   //while there is characters in the string
   while(*pw != '\0')
   {
       //check whether the character is lower case letter
       if(*pw >='a' && *pw <= 'z')
       {
           lower=true;
       }

       //check whether the character is upper case letter
       if(*pw >='A' && *pw <= 'Z')
       {
           upper=true;
       }

       //check whether the character is a digit
       if(*pw >='0' && *pw <= '9')
       {
           digit=true;
       }

       //update the pointer to next
       pw++;
       lengthCount++;

   }

   //check the length requirement
   if(lengthCount>=6)
   {
       length = true;
   }

   //check whether all the requirements satisfied
   if(length && upper && lower && digit)
   {
       //display the result
       cout<<" The password is valid!!!!"<<endl;
   }
   else
   {
       cout<<" The password not satisfying the requirements!!!!"<<endl;
   }
  
}

Sample Outputs: