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CS50 Hacker Problem Set 1

By: bubblesort on Jan 16th, 2014  |  syntax: C  |  size: 6.74 KB  |  views: 485  |  expires: Never
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  1. /*This is my source code for the hacker edition of pset1 in Harvard's CS50.  I'm getting a few errors off of check50 on my mario program, but as far as I can tell it meets the specifications set forth in the assignment, and since it can't be turned in anyway I'm just going to let the problems go.
  2.  
  3. ===================================================================
  4. credit.c source code:
  5. -------------------------------------------------------------------*/
  6. #include <cs50.h>
  7. #include <stdio.h>
  8. #include <math.h>
  9.  
  10. //used to get the length of the credit card number entered
  11. int CCLength(long long int ccNum)
  12. {
  13.     if(ccNum < 999999999999)
  14.         return 0;
  15.        
  16.     else if(ccNum <= 9999999999999)
  17.         return 13;
  18.        
  19.     else if(ccNum <= 99999999999999)
  20.         return 14;
  21.        
  22.     else if(ccNum <= 999999999999999)
  23.         return 15;
  24.        
  25.     else if(ccNum <= 9999999999999999)
  26.         return 16;
  27.        
  28.     else
  29.         return 0;
  30. }
  31.  
  32. int main(void)
  33. {
  34.     printf("Please enter a credit card number.\n");
  35.     long long int cNumber = GetDouble();
  36.     //printf("You entered %lli\n", cNumber);
  37.    
  38.     //get the length of the credit card number
  39.     int cLength = CCLength(cNumber);
  40.    
  41.     //if the number is too short or too long then it is invalid
  42.     if(cLength == 0)
  43.     {
  44.         //printf("This number is not the right length to be a credit card number.\n");
  45.         printf("INVALID\n");
  46.         return 0;
  47.     }
  48.    
  49.     int total1 = 0;
  50.     int total2 = 0;
  51.     int ccType = 0;
  52.    
  53.     for(int count=0; count < cLength; count++)
  54.     {
  55.         //seperate the digit we are going to be working with
  56.         long long int mod = pow(10, count+1);
  57.         long long int divide = pow(10, count);
  58.         int digit = (cNumber % mod) / divide;        
  59.        
  60.         //if this is an odd digit then add it to the total
  61.         if(count%2 == 0)
  62.             total1 += digit;
  63.        
  64.         //if this is an even digit then multiply by two and add each digit of the result to the total
  65.         else
  66.         {
  67.             int oddDigits = (digit * 2);
  68.             //if the result has 1 digit then add it to the total
  69.             if(oddDigits < 10)
  70.                 total2 += oddDigits;
  71.             //if the result has 2 digits then add each digit to the total
  72.             else
  73.             {
  74.                 oddDigits = (oddDigits % 10) + 1;
  75.                 total2 += oddDigits;
  76.             }
  77.         }
  78.         //if we are on the last 2 digits then put them in ccType to identify the kind of card this is.
  79.         if(cLength - count == 2)
  80.             ccType += digit;
  81.         else if(cLength - count == 1)
  82.             ccType += (digit * 10);
  83.        
  84.         //printf("Mod = %lli, Divide = %lli, Result = %lli, Total1 = %i, Total2 = %i\n", mod, divide, ((cNumber % mod) / divide), total1, total2 );
  85.     }
  86.     int finalTotal = total1 + total2;
  87.     //printf("The total is %i.\n", finalTotal);
  88.     if((finalTotal % 10) == 0)
  89.     {
  90.         //printf("This is a valid credit card number.\n");
  91.        
  92.         if((ccType == 34) || (ccType == 37))
  93.             printf("AMEX\n");
  94.         else if((ccType == 51) || (ccType == 52) || (ccType == 53) || (ccType == 54) || (ccType == 55))
  95.             printf("MASTERCARD\n");
  96.         else if(ccType / 10 == 4) //because we only need the first digit to ID a visa card
  97.             printf("VISA\n");
  98.         else
  99.             printf("INVALID\n");
  100.     }
  101.     else
  102.         printf("INVALID\n");    
  103. }
  104. /*===================================================================
  105. Running credit:
  106. -------------------------------------------------------------------
  107. jharvard@appliance (~/Dropbox/CS50/hacker1/credit): ./credit
  108. Please enter a credit card number.
  109. 4012888888881881
  110. VISA
  111. ===================================================================
  112. Checking credit:
  113. -------------------------------------------------------------------
  114. jharvard@appliance (~/Dropbox/CS50/hacker1/credit): check50 2014/x/hacker1/credit credit.c
  115. :) credit.c exists
  116. :) credit.c compiles
  117. :) identifies 378282246310005 as AMEX
  118. :) identifies 371449635398431 as AMEX
  119. :) identifies 5555555555554444 as MASTERCARD
  120. :) identifies 5105105105105100 as MASTERCARD
  121. :) identifies 4111111111111111 as VISA
  122. :) identifies 4012888888881881 as VISA
  123. :) identifies 1234567890 as INVALID
  124. :) rejects a non-numeric input of "foo"
  125. :) rejects a non-numeric input of ""
  126. https://sandbox.cs50.net/checks/0dd1e381e3254b7c8dc9060f359a401b
  127.  
  128.  
  129. ===================================================================
  130. mario.c source code:
  131. -------------------------------------------------------------------*/
  132. #include <cs50.h>
  133. #include <stdio.h>
  134.  
  135. int main(void)
  136. {
  137.     printf("Please enter a number between 1 and 23:  ");
  138.     int height = GetInt();
  139.    
  140.     if((height > 23) || (height < 1))
  141.     {
  142.         //printf("Invalid input\n");
  143.         return 0;
  144.     }
  145.    
  146.     int x = 0;
  147.     int y = 0;
  148.    
  149.     for(int count = 0; count < height; count++)
  150.     {
  151.         //makes the left side of the pyramid
  152.         while(y < height)
  153.         {
  154.             int number = height - (count + 1);
  155.             if(y >= number)
  156.                 printf("#");
  157.             else
  158.                 printf(" ");
  159.             y++;
  160.         }
  161.         y = 0;
  162.        
  163.         //makes the spaces in the middle
  164.         printf("  ");
  165.        
  166.         //makes the right side of the pyramid
  167.         while(x < height)
  168.         {            
  169.             if(x > count)
  170.                 printf(" ");
  171.             else
  172.                 printf("#");
  173.            
  174.             x++;
  175.         }
  176.         x = 0;
  177.         printf("\n");
  178.     }
  179. }
  180. /*===================================================================
  181. Running it:
  182. -------------------------------------------------------------------
  183. jharvard@appliance (~/Dropbox/CS50/hacker1/mario): ./mario
  184. Please enter a number between 1 and 23:  5
  185.     #  #    
  186.    ##  ##  
  187.   ###  ###  
  188.  ####  ####
  189. #####  #####
  190. ===================================================================
  191. Checking it:
  192. -------------------------------------------------------------------
  193. jharvard@appliance (~/Dropbox/CS50/hacker1/mario): check50 2014/x/hacker1/mario mario.c
  194. :) mario.c exists
  195. :) mario.c compiles
  196. :( rejects a height of -1
  197.    \ expected output, not an exit code of 0
  198. :) handles a height of 0 correctly
  199. :) handles a height of 1 correctly
  200. :( handles a height of 2 correctly
  201.    \ expected output, but not " #  # \n##  ##\n"
  202. :( handles a height of 23 correctly
  203.    \ expected output, but not "                      #  #             ..."
  204. :( rejects a height of 24
  205.    \ expected output, not an exit code of 0
  206. :) rejects a non-numeric height of "foo"
  207. :) rejects a non-numeric height of ""
  208. https://sandbox.cs50.net/checks/d34c1b1bba124ebcb47d5406850cedc3