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  1. #include <stdio.h>
  2. #include <string.h>
  3. #include <ctype.h>
  4. #include <stdlib.h>
  5. #include <time.h>
  6. int passwordIsLongEnough(char str[]) /* funk.1 */
  7. {
  8.  
  9.     int i;
  10.     int counter = 0;
  11.     int returnera;
  12.     for (i = 0; str[i] != '\0'; ++i)
  13.         counter++;
  14.     if (counter < 8)
  15.         returnera = 0;
  16.     else
  17.         returnera = 1;
  18.     return returnera;
  19.  
  20. }
  21.  
  22. int passwordContainsDigit(char str[]) /* funk.2 */
  23. {
  24.     int  i, digit = 0, returnera;
  25.  
  26.     for (i = 0; str[i] != '\0'; ++i)
  27.         if (isdigit(str[i]))
  28.             digit++;
  29.     if (digit > 0)
  30.  
  31.         returnera = 1;
  32.  
  33.     else
  34.  
  35.         returnera = 0;
  36.  
  37.     return returnera;
  38. }
  39. int passwordHasMixedCase(char str[])
  40. {
  41.     int i, returnera = 0, upper = 0, lower = 0;
  42.     for (i = 0; str[i] != '\0'; i++)
  43.     {
  44.         if (islower(str[i]))
  45.         {
  46.             lower++;
  47.         }
  48.         if (isupper(str[i]))
  49.         {
  50.             upper++;
  51.         }
  52.  
  53.         if (upper > 0 && lower > 0)
  54.         {
  55.             returnera = 1;
  56.         }
  57.         else
  58.         {
  59.             returnera = 0;
  60.         }
  61.     }
  62.     return returnera;
  63. }
  64. void capitalize(char Name[])
  65. {
  66.  
  67.     Name[0] = toupper(Name[0]);
  68.  
  69.  
  70. }
  71.  
  72.  
  73.  
  74. int isSafePassword(char password[])
  75. {
  76.     int length, digit, upperLowerCase, returnera;
  77.     int faultCounter = 0;
  78.     length = passwordIsLongEnough(password);
  79.     digit = passwordContainsDigit(password);
  80.     upperLowerCase = passwordHasMixedCase(password);
  81.  
  82.     if (length == 0)
  83.     {
  84.         printf("Your password is not long enough, it has to be at least 8 characters \n");
  85.         faultCounter++;
  86.     }
  87.     if (digit == 0)
  88.     {
  89.         printf("You password has to contain at least one digit\n");
  90.         faultCounter++;
  91.     }
  92.     if (upperLowerCase == 0)
  93.     {
  94.         printf("Your password has to have at least one upper case letter and at least one lower case letter \n");
  95.         faultCounter++;
  96.     }
  97.  
  98.     return faultCounter;
  99.  
  100. }
  101.  
  102.  
  103. struct account
  104. {
  105.     char username[30];
  106.     char password[30];
  107.     char newPassword[30];
  108.     int passwordControl;
  109.  
  110. };
  111.  
  112. struct account konto(void)
  113. {
  114.     struct account userAccount;
  115.  
  116.     printf("Enter a username: \n");
  117.     scanf("%s", userAccount.username);
  118.     capitalize(userAccount.username);
  119.     do
  120.     {
  121.         do
  122.         {
  123.            
  124.             printf("Enter a password:\n");
  125.             scanf("%s", userAccount.password);
  126.             userAccount.passwordControl = isSafePassword(userAccount.password);
  127.             if(userAccount.passwordControl>0)
  128.             {
  129.                 printf("You have %d, faults in yur password\n", userAccount.passwordControl);
  130.             }
  131.  
  132.         } while (userAccount.passwordControl > 0);
  133.         printf("Please confirm your password:\n");
  134.         scanf("%s", userAccount.newPassword);
  135.  
  136.         if (strcmp(userAccount.password, userAccount.newPassword) == 0)
  137.         {
  138.             printf("The password is confirmed\n");
  139.             printf("The password %s is associated whith user :%s\n", userAccount.password, userAccount.username);
  140.         }
  141.         else
  142.             printf("The passwords do not match\n");
  143.     } while (strcmp(userAccount.password, userAccount.newPassword) != 0);
  144.  
  145.  
  146.     return userAccount;
  147. }
  148.  
  149.  
  150. int main(void)
  151. {
  152.     int antalKonton;
  153.     int i;
  154.  
  155.     printf("How many useraccounts do you want to enter? \n");
  156.     scanf("%d", &antalKonton);
  157.  
  158.     struct account* arr = (struct account*) malloc(sizeof(struct account)*antalKonton);
  159.  
  160.     if (arr == NULL)
  161.         printf("Could not allocate %d elements", antalKonton);
  162.     else
  163.     {
  164.         for (i = 0; i < antalKonton; i++)
  165.         {
  166.             arr[i] = konto();
  167.         }
  168.         printf("Username: \t \t password: \n");
  169.         for (i = 0; i < antalKonton; i++)
  170.  
  171.         {
  172.  
  173.             printf("%s \t \t %s \n", arr[i].username, arr[i].password);
  174.         }
  175.         free(arr);
  176.  
  177.     }
  178.     return 0;
  179.  
  180. }
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