Armstrong Numbers

Other "Armstrong Numbers" solutions.

#include "armstrong_numbers.h"
#include <stdio.h>
#include <math.h>
#include <string.h>

int char_to_int(char c)
{
   return c - '0';
}

int is_armstrong_number(int candidate)
{
   char s[16] = {'\0'};
   sprintf(s, "%d", candidate);

   int len = strlen(s);
   int sum = 0;
   for (int i = 0; i < len; i++)
      sum += pow(char_to_int(s[i]), len);

   return candidate == sum;
}

Darts

Other "Darts" solutions.

#include "darts.h"
#include <math.h>

uint8_t score(coordinate_t coord)
{
   float hyp = sqrt(pow(coord.x, 2) + pow(coord.y, 2));
   int score = 0;

   if (hyp <= 1.0F)
   {
      score = 10;
   }
   else if (hyp <= 5.0F)
   {
      score = 5;
   }
   else if (hyp <= 10.0F)
   {
      score = 1;
   }

   return score;
}

Hello World

Other "Hello World" solutions.

#include "hello_world.h"

const char *hello(void)
{
   return "Hello, World!";
}

Linked List

Other "Linked List" solutions.

#include "linked_list.h"

typedef struct list_item
{
   struct list_item *next;
   struct list_item *previous;
   ll_data_t data;
} list_item_t;

list_item_t **new_list()
{
   list_item_t *list =
       &(list_item_t){.next = 0, .previous = 0, .data = 0};
   return list;
}

bool is_list_empty(struct list_item **list)
{
   return !(list && *list);
}

Resistor Color

Other "Resistor Color" solutions.

#include "resistor_color.h"

resistor_band_t *colors()
{
   static resistor_band_t band[resistor_band_length];
   for (resistor_band_t c = 0; c < resistor_band_length; c += 1)
      band[(int)c] = c;

   return band;
}

int color_code(resistor_band_t c)
{
   return (int)c;
}

Resistor Color Duo

Other "Resistor Color Duo" solutions.

#include "resistor_color_duo.h"
#include <stdio.h>
#define MAX_DIGITS 2;

int color_code(resistor_band_t colors[])
{
   return colors[0] * 10 + colors[1];
}

Resistor Color Trio

Other "Resistor Color Trio" solutions.

#include "resistor_color_trio.h"