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  1. //Sam Partovi                          CS1A                   Ch. 10, P.590, #12
  2. /*******************************************************************************
  3. * DETERMINE PASSWORD VALIDITY
  4. * ____________________________________________________________
  5. * This program accepts a given password and determines its validity based on
  6. * specified minimum password requirements, such as character and digit count.
  7. * ____________________________________________________________
  8. *INPUT
  9. *  userPassword : Given user password
  10. *  minLength    : Minimum length of password
  11. *  minUppercase : Minimum number of uppercase letters
  12. *  minLowercase : Minimum number of lowercase letters
  13. *  minDigits    : Minimum number of digits
  14. *OUTPUT
  15. * Messages indicating whether the password meets the requirements or not.
  16. *******************************************************************************/
  17.  
  18. #include <iostream>
  19. #include <string>
  20. #include <cctype>
  21. using namespace std;
  22.  
  23. //Structure to define password requirements
  24. struct Password {
  25.     int minLength;       //INPUT - Minimum length of password
  26.     int minUppercase;    //INPUT - Minimum number of uppercase letters
  27.     int minLowercase;    //INPUT - Minimum number of lowercase letters
  28.     int minDigits;       //INPUT - Minimum number of digits
  29. };
  30.  
  31. //Function prototype
  32. void PasswordVerifyFunc(const string& userPassword, 
  33.                         const Password& requirements);
  34.  
  35. int main() {
  36. //Password requirements
  37.  Password requirements = {6, 1, 1, 1};
  38.  string userPassword;
  39.  
  40. //Prompt for a password
  41.  cout << "Enter a password: ";
  42.  cin >> userPassword;
  43.  cout << endl;
  44.  
  45. //Verify the password
  46.  PasswordVerifyFunc(userPassword, requirements);
  47.  
  48.     return 0;
  49. }
  50.  
  51. /*******************************************************************************
  52. * Definition of PasswordVerifyFunc function:
  53. *  This function verifies the given password in userPassword against the 
  54. *  specified requirements in the Password structure.
  55. *******************************************************************************/
  56. void PasswordVerifyFunc(const string& userPassword, 
  57.                         const Password& requirements) {
  58.  
  59.  int charCount = userPassword.length();    //Get the length of the password
  60.  int uppercaseCount = 0;                  //Count uppercase letters
  61.  int lowercaseCount = 0;                 //Count lowercase letters
  62.  int digitCount = 0;                    //Count digits
  63.  
  64. //Iterate through the password to count character types
  65.  for (char c : userPassword) {
  66.     if (isupper(c)) uppercaseCount++;
  67.     if (islower(c)) lowercaseCount++;
  68.     if (isdigit(c)) digitCount++;
  69.     }
  70.  
  71. //Check requirements and display results
  72.  bool isValid = true;
  73.  
  74.  if (charCount < requirements.minLength) {
  75.     cout << "Password must be at least " << requirements.minLength 
  76.          << " characters long.\n";
  77.     isValid = false;
  78.     }
  79.  if (uppercaseCount < requirements.minUppercase) {
  80.     cout << "Password must contain at least " << requirements.minUppercase 
  81.          << " uppercase letter(s).\n";
  82.     isValid = false;
  83.     }
  84.  if (lowercaseCount < requirements.minLowercase) {
  85.     cout << "Password must contain at least " << requirements.minLowercase 
  86.          << " lowercase letter(s).\n";
  87.     isValid = false;
  88.     }
  89.  if (digitCount < requirements.minDigits) {
  90.     cout << "Password must contain at least " << requirements.minDigits 
  91.          << " digit(s).\n";
  92.     isValid = false;
  93.     }
  94.  
  95. //If all requirements are met
  96.  if (isValid) {
  97.   cout << "Password is valid.\n";
  98.     }
  99. }
Success #stdin #stdout 0s 5288KB
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Enter a password: 
Password must be at least 6 characters long.
Password must contain at least 1 uppercase letter(s).
Password must contain at least 1 digit(s).
https://ideone.com/zs16Xv
CHAPTER 10 #12
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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