Task: Morse code
C: 

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

#define BIND(A,L,H) ((L)<(A)?(A)<(H)?(A):(H):(L))


char
  
  
  dih[50],dah[50],medium[30],word[30],
  *dd[2] = {dih,dah};
const char
  *ascii = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.,?'!/()&:;=+-_\"$@",
  *itu[] = {
     "13","3111","3131","311","1","1131","331","1111","11","1333","313","1311","33","31","333","1331","3313","131","111","3","113","1113","133","3113","3133","3311","33333","13333","11333","11133","11113","11111","31111","33111","33311","33331","131313","331133","113311","133331","313133","31131","31331","313313","13111","333111","313131","31113","13131","311113","113313","131131","1113113","133131"
  };

void append(char*s,const char*morse) {
  for (; *morse; ++morse)
    strcat(s,dd['3'==*morse]);
  strcat(s,medium);
}

char*translate(const char*i,char*o) {
  const char*pc;
  sprintf(o,"beep");
  for (; *i; ++i)
    if (NULL == (pc = strchr(ascii,toupper(*i))))
      strcat(o,word);
    else
      append(o,itu[pc-ascii]);
  strcat(o,word);
  return o;
}

int main(int ac,char*av[]) {
  char
    sin[73],sout[100000];
  int
    dit = 100;
  if (1 < ac) {
    if (strlen(av[1]) != strspn(av[1],"0123456789"))
      return 0*fprintf(stderr,"use: %s [duration]   dit in ms, default %d\n",*av,dit);
    dit = BIND(atoi(av[1]),1,1000);
  }
  sprintf(dah," -n -f 440 -l %d -D %d",3*dit,dit);
  sprintf(dih," -n -f 440 -l %d -D %d",dit,dit);
  sprintf(medium," -n -D %d",(3-1)*dit);
  sprintf(word," -n -D %d",(7-(3-1)-1)*dit);
  while (NULL != fgets(sin,72,stdin))
    puts(translate(sin,sout));
  return 0;
}

Java: import java.util.*;

public class MorseCode {

    final static String[][] code = {
        {"A", ".-     "}, {"B", "-...   "}, {"C", "-.-.   "}, {"D", "-..    "},
        {"E", ".      "}, {"F", "..-.   "}, {"G", "--.    "}, {"H", "....   "},
        {"I", "..     "}, {"J", ".---   "}, {"K", "-.-    "}, {"L", ".-..   "},
        {"M", "--     "}, {"N", "-.     "}, {"O", "---    "}, {"P", ".--.   "},
        {"Q", "--.-   "}, {"R", ".-.    "}, {"S", "...    "}, {"T", "-      "},
        {"U", "..-    "}, {"V", "...-   "}, {"W", ".-   - "}, {"X", "-..-   "},
        {"Y", "-.--   "}, {"Z", "--..   "}, {"0", "-----  "}, {"1", ".----  "},
        {"2", "..---  "}, {"3", "...--  "}, {"4", "....-  "}, {"5", ".....  "},
        {"6", "-....  "}, {"7", "--...  "}, {"8", "---..  "}, {"9", "----.  "},
        {"'", ".----. "}, {":", "---... "}, {",", "--..-- "}, {"-", "-....- "},
        {"(", "-.--.- "}, {".", ".-.-.- "}, {"?", "..--.. "}, {";", "-.-.-. "},
        {"/", "-..-.  "}, {"-", "..--.- "}, {")", "---..  "}, {"=", "-...-  "},
        {"@", ".--.-. "}, {"\"", ".-..-."}, {"+", ".-.-.  "}, {" ", "/"}}; 

    final static Map<Character, String> map = new HashMap<>();

    static {
        for (String[] pair : code)
            map.put(pair[0].charAt(0), pair[1].trim());
    }

    public static void main(String[] args) {
        printMorse("sos");
        printMorse("   Hello     World!");
        printMorse("Rosetta Code");
    }

    static void printMorse(String input) {
        System.out.printf("%s %n", input);

        input = input.trim().replaceAll("[ ]+", " ").toUpperCase();
        for (char c : input.toCharArray()) {
            String s = map.get(c);
            if (s != null)
                System.out.printf("%s ", s);
        }
        System.out.println("\n");
    }
}