iPods

gistfile1.c

/*
 * To compile:
 * $ clang iPod.c -o iPod
 */

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

void print_help(FILE *file) {
  /* print help here */
}

int main(int argc, char *argv[]) {
  if (argc != 2) {
    print_help(stderr);
    return 1;
  }
  
  enum {
    Brazil,
    Argentina,
    NumberOfCountries
  } country;
  
  unsigned stocks[NumberOfCountries] = { 100, 100 };
  char *countryNames[NumberOfCountries] = {
    "Brazil",
    "Argentina"
  };
  unsigned costs[NumberOfCountries] = { 100, 50 };
  
  size_t lengthOfLargestCountryName = 0;
  for (int i = 0; i < NumberOfCountries; i++) {
    size_t countryNameLength = strlen(countryNames[i]);
    if (countryNameLength > lengthOfLargestCountryName) {
      lengthOfLargestCountryName = countryNameLength;
    }
  }
  
  char *countryNameToken = strtok(argv[1], ":");
  char *countryName = malloc(strlen(countryNameToken));
  memcpy(countryName, countryNameToken, strlen(countryNameToken));
  char *orderCountString = strtok(NULL, ":");
  
  unsigned cost;
  for (int j = 0; j < NumberOfCountries; j++) {
    if (strcmp(countryNames[j], countryName) == 0) {
      unsigned orderCount = atoi(orderCountString);
      stocks[j] -= orderCount;
      cost = orderCount * costs[j];
      break;
    }
  }
  
  printf("%u:%u:%u", cost, stocks[0], stocks[1]);
  
  free(countryName);
  return 0;
}