Thread: trying to implement this code in c

Hi,

I am trying to implement this PHP code in C:

Code:

    function showCombinations($string, $traits, $i)
    {
        if ($i >= count($traits))
            echo trim($string) . "\n";
        else
        {
            foreach ($traits[$i] as $trait)
                showCombinations("$string $trait", $traits, $i + 1);
        }
    }

    $traits = array
    (
        array('Happy', 'Sad', 'Angry', 'Hopeful'),
        array('Outgoing', 'Introverted'),
        array('Tall', 'Short', 'Medium'),
        array('Handsome', 'Plain', 'Ugly')
    );

    showCombinations('', $traits, 0);

Having a real hard time of it. I'm a PHP programmer, and the way C handles strings is so much different. Could anyone offer some help?

Sure:

Here is my code so far:

Code:

#include <stdio.h>
#include <string.h>

int printCombinations(char mystr[],int mystrIndex, char table[2][3], int tableLength, int currentIndex)
{
  int i;

  if (currentIndex >= tableLength)
    {
      printf("%s",mystr);
      printf("\n");
    }
  else
    {
      for (i = 0; i < tableLength; i++)
	{
	  mystr[mystrIndex++] = table[currentIndex][i];
	  currentIndex++;
	  printCombinations(mystr,mystrIndex,table,tableLength,currentIndex);
	}
    }
}

int main(void)
{
  char mytable[2][3];

  mytable[0][0] = 'a';
  mytable[0][1] = 'b';
  mytable[0][2] = 'c';
  mytable[1][0] = '1';
  mytable[1][1] = '2';
  mytable[1][2] = '3';
  
  char mystr[1000];
  int mystrIndex=0;

  printCombinations(mystr,mystrIndex,mytable,3,0);
  return 0;
}

In C, strings are simply arrays of chars, and can be passed around as pointers to the first char in that array. You could make your 2d array of type (char *) instead of (char) and initialize each one to the strings you had in your PHP. All the string functions in C expect a pointer like this, and will work properly when passed one of these pointers.

Other than that - do you have any specific questions or specific topics you're lost on? It seems like you know enough C to do most of that.

Cross-posted