Morse Code Implementation
Morse code is a method of transmitting text information as a series of on-off tones, lights, or clicks that can be directly understood by a skilled listener or observer without special equipment. It is named for Samuel F. B. Morse, an inventor of the telegraph.
The algorithm is very simple. Every character in the English language is substituted by a series of ‘dots’ and ‘dashes’ or sometimes just singular ‘dot’ or ‘dash’ and vice versa.
Every text string is converted into the series of dots and dashes. For this every character is converted into its Morse code and appended in encoded message. Here we have copied space as it is. We have considered both numbers and alphabets.
Examples:
Input : w3wiki Output : --...-.-.....-.---.-.--...-.-... Input : program Output : .--..-.-----..-..---
Implementation:
C++
// CPP program to demonstrate Morse code #include <iostream> using namespace std; // function to encode a alphabet as // Morse code string morseEncode( char x) { // refer to the Morse table // image attached in the article switch (x) { case 'a' : return ".-" ; case 'b' : return "-..." ; case 'c' : return "-.-." ; case 'd' : return "-.." ; case 'e' : return "." ; case 'f' : return "..-." ; case 'g' : return "--." ; case 'h' : return "...." ; case 'i' : return ".." ; case 'j' : return ".---" ; case 'k' : return "-.-" ; case 'l' : return ".-.." ; case 'm' : return "--" ; case 'n' : return "-." ; case 'o' : return "---" ; case 'p' : return ".--." ; case 'q' : return "--.-" ; case 'r' : return ".-." ; case 's' : return "..." ; case 't' : return "-" ; case 'u' : return "..-" ; case 'v' : return "...-" ; case 'w' : return ".--" ; case 'x' : return "-..-" ; case 'y' : return "-.--" ; case 'z' : return "--.." ; case '1' : return ".----" ; case '2' : return "..---" ; case '3' : return "...--" ; case '4' : return "....-" ; case '5' : return "....." ; case '6' : return "-...." ; case '7' : return "--..." ; case '8' : return "---.." ; case '9' : return "----." ; case '0' : return "-----" ; default : cerr << "Found invalid character: " << x << ' ' << std::endl; exit (0); } } void morseCode(string s) { // character by character print // Morse code for ( int i = 0; s[i]; i++) cout << morseEncode(s[i]); cout << endl; } // Driver's code int main() { string s = "w3wiki" ; morseCode(s); return 0; } |
Java
// Java program to demonstrate Morse code class GFG { // function to encode a alphabet as // Morse code static String morseEncode( char x) { // refer to the Morse table // image attached in the article switch (x) { case 'a' : return ".-" ; case 'b' : return "-..." ; case 'c' : return "-.-." ; case 'd' : return "-.." ; case 'e' : return "." ; case 'f' : return "..-." ; case 'g' : return "--." ; case 'h' : return "...." ; case 'i' : return ".." ; case 'j' : return ".---" ; case 'k' : return "-.-" ; case 'l' : return ".-.." ; case 'm' : return "--" ; case 'n' : return "-." ; case 'o' : return "---" ; case 'p' : return ".--." ; case 'q' : return "--.-" ; case 'r' : return ".-." ; case 's' : return "..." ; case 't' : return "-" ; case 'u' : return "..-" ; case 'v' : return "...-" ; case 'w' : return ".--" ; case 'x' : return "-..-" ; case 'y' : return "-.--" ; // for space case 'z' : return "--.." ; case '1' : return ".----" ; case '2' : return "..---" ; case '3' : return "...--" ; case '4' : return "....-" ; case '5' : return "....." ; case '6' : return "-...." ; case '7' : return "--..." ; case '8' : return "---.." ; case '9' : return "----." ; case '0' : return "-----" ; } return "" ; } static void morseCode(String s) { // character by character print // Morse code for ( int i = 0 ;i<s.length(); i++) System.out.print(morseEncode(s.charAt(i))); System.out.println(); } // Driver code public static void main (String[] args) { String s = "w3wiki" ; morseCode(s); } } // This code is contributed by Anant Agarwal. |
Python 3
# Python3 program to demonstrate Morse code # function to encode a alphabet as # Morse code def morseEncode(x): # refer to the Morse table # image attached in the article if x is 'a' : return ".-" elif x is 'b' : return "-..." elif x is 'c' : return "-.-." elif x is 'd' : return "-.." elif x is 'e' : return "." elif x is 'f' : return "..-." elif x is 'g' : return "--." elif x is 'h' : return "...." elif x is 'i' : return ".." elif x is 'j' : return ".---" elif x is 'k' : return "-.-" elif x is 'l' : return ".-.." elif x is 'm' : return "--" elif x is 'n' : return "-." elif x is 'o' : return "---" elif x is 'p' : return ".--." elif x is 'q' : return "--.-" elif x is 'r' : return ".-." elif x is 's' : return "..." elif x is 't' : return "-" elif x is 'u' : return "..-" elif x is 'v' : return "...-" elif x is 'w' : return ".--" elif x is 'x' : return "-..-" elif x is 'y' : return "-.--" elif x is 'z' : return "--.." elif x is '1' : return ".----" ; elif x is '2' : return "..---" ; elif x is '3' : return "...--" ; elif x is '4' : return "....-" ; elif x is '5' : return "....." ; elif x is '6' : return "-...." ; elif x is '7' : return "--..." ; elif x is '8' : return "---.." ; elif x is '9' : return "----." ; elif x is '0' : return "-----" ; # character by character print # Morse code def morseCode(s): for character in s: print (morseEncode(character), end = "") # Driver Code if __name__ = = "__main__" : s = "w3wiki" morseCode(s) # This code is contributed # by Vivek Kumar Singh |
C#
// C# program to demonstrate Morse code using System; class GFG { // function to encode a alphabet as // Morse code static string morseEncode( char x) { // refer to the Morse table // image attached in the article switch (x) { case 'a' : return ".-" ; case 'b' : return "-..." ; case 'c' : return "-.-." ; case 'd' : return "-.." ; case 'e' : return "." ; case 'f' : return "..-." ; case 'g' : return "--." ; case 'h' : return "...." ; case 'i' : return ".." ; case 'j' : return ".---" ; case 'k' : return "-.-" ; case 'l' : return ".-.." ; case 'm' : return "--" ; case 'n' : return "-." ; case 'o' : return "---" ; case 'p' : return ".--." ; case 'q' : return "--.-" ; case 'r' : return ".-." ; case 's' : return "..." ; case 't' : return "-" ; case 'u' : return "..-" ; case 'v' : return "...-" ; case 'w' : return ".--" ; case 'x' : return "-..-" ; case 'y' : return "-.--" ; // for space case 'z' : return "--.." ; case '1' : return ".----" ; case '2' : return "..---" ; case '3' : return "...--" ; case '4' : return "....-" ; case '5' : return "....." ; case '6' : return "-...." ; case '7' : return "--..." ; case '8' : return "---.." ; case '9' : return "----." ; case '0' : return "-----" ; } return "" ; } static void morseCode( string s) { // character by character print // Morse code for ( int i = 0;i<s.Length; i++) Console.Write(morseEncode(s[i])); Console.WriteLine(); } // Driver code public static void Main () { string s = "w3wiki" ; morseCode(s); } } // This code is contributed by vt_m. |
PHP
<?php // php program to demonstrate // Morse code // function to encode a // alphabet as Morse code function morseEncode( $x ) { // refer to the Morse table // image attached in the article switch ( $x ) { case 'a' : return ".-" ; case 'b' : return "-..." ; case 'c' : return "-.-." ; case 'd' : return "-.." ; case 'e' : return "." ; case 'f' : return "..-." ; case 'g' : return "--." ; case 'h' : return "...." ; case 'i' : return ".." ; case 'j' : return ".---" ; case 'k' : return "-.-" ; case 'l' : return ".-.." ; case 'm' : return "--" ; case 'n' : return "-." ; case 'o' : return "---" ; case 'p' : return ".--." ; case 'q' : return "--.-" ; case 'r' : return ".-." ; case 's' : return "..." ; case 't' : return "-" ; case 'u' : return "..-" ; case 'v' : return "...-" ; case 'w' : return ".--" ; case 'x' : return "-..-" ; case 'y' : return "-.--" ; case '1' : return ".----" ; case '2' : return "..---" ; case '3' : return "...--" ; case '4' : return "....-" ; case '5' : return "....." ; case '6' : return "-...." ; case '7' : return "--..." ; case '8' : return "---.." ; case '9' : return "----." ; case '0' : return "-----" ; // for space case 'z' : return "--.." ; } } function morseCode( $s ) { // Character by character // print Morse code for ( $i = 0; $i < strlen ( $s ); $i ++) echo morseEncode( $s [ $i ]); echo "\n" ; } // Driver code $s = "w3wiki" ; morseCode( $s ); // This code is contributed by mits ?> |
Javascript
// JavaScript program to demonstrate Morse code // function to encode a character as Morse code function morseEncode(x) { // refer to the Morse table switch (x) { case 'a' : return ".-" ; case 'b' : return "-..." ; case 'c' : return "-.-." ; case 'd' : return "-.." ; case 'e' : return "." ; case 'f' : return "..-." ; case 'g' : return "--." ; case 'h' : return "...." ; case 'i' : return ".." ; case 'j' : return ".---" ; case 'k' : return "-.-" ; case 'l' : return ".-.." ; case 'm' : return "--" ; case 'n' : return "-." ; case 'o' : return "---" ; case 'p' : return ".--." ; case 'q' : return "--.-" ; case 'r' : return ".-." ; case 's' : return "..." ; case 't' : return "-" ; case 'u' : return "..-" ; case 'v' : return "...-" ; case 'w' : return ".--" ; case 'x' : return "-..-" ; case 'y' : return "-.--" ; case 'z' : return "--.." ; case '1' : return ".----" ; case '2' : return "..---" ; case '3' : return "...--" ; case '4' : return "....-" ; case '5' : return "....." ; case '6' : return "-...." ; case '7' : return "--..." ; case '8' : return "---.." ; case '9' : return "----." ; case '0' : return "-----" ; default : console.error( "Found invalid character: " + x); process.exit(0); } } // function to print Morse code function morseCode(s) { // character by character print Morse code let result = "" ; for (let i = 0; i < s.length; i++) { result += morseEncode(s[i]); } console.log(result); } // Driver's code let s = "w3wiki" ; morseCode(s); // This code is contributed by rudra1807raj |
Output
--...-.-.....-.---.-.--...-.-...
Time Complexity: O(n)
Auxiliary Space: O(1)