1_2.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3
   4 void set_calories(int* current, int* highest) {
   5     if (*current > highest[2]) {
   6         highest[0] = highest[1];
   7         highest[1] = highest[2];
   8         highest[2] = *current;
   9     } else if (*current > highest[1]) {
  10         highest[0] = highest[1];
  11         highest[1] = *current;
  12     } else if (*current > highest[0]) {
  13         highest[0] = *current;
  14     }
  15
  16     *current = 0;
  17 }
  18
  19
  20 int main()
  21 {
  22     char *buffer;
  23     size_t bufsize;
  24     size_t characters;
  25
  26     int current_calories = 0;
  27     int highest_calories[3] = {0, 0, 0};
  28
  29     while ((characters = getline(&buffer, &bufsize, stdin)) != -1) {
  30         --characters;
  31
  32         buffer[characters] = 0;
  33
  34         if (characters == 0) {
  35             set_calories(&current_calories, highest_calories);
  36         }
  37
  38         current_calories += atoi(buffer);
  39     }
  40
  41     set_calories(&current_calories, highest_calories);
  42     printf("The 3 elves with the highest calories have %d calories",
  43            highest_calories[0] + highest_calories[1] + highest_calories[2]);
  44 }