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#pragma warning(disable : 4996)
#include <iostream>
#include <fstream>
#include <iomanip>
#include <ctime>
#include <string>
#include <cctype>
#include<stdlib.h>
using namespace std;
struct TREENODE {
char letter;
TREENODE* left;
TREENODE* right;
TREENODE() {
letter = '*';
left = 0;
right = 0;
}
};
struct MORSECODE {
char letter;
char code[27];
};
class TELEGRAPH {
private:
static MORSECODE table[40];
static TREENODE* root;
static void destroyTree(TREENODE* NODE);
public:
TELEGRAPH() {
root = NULL;
}
static void buildTree();
static void destroyTree();
void Encode(char text[], char morse[]);
void Decode(char morse[], char text[]);
};
MORSECODE TELEGRAPH::table[40] = {
{"E", ". " }, { "T", "- " }, { "I", ".. " }, { "A", ".- " }, { "N", "-. " }, { "M", "-- " },
{"S", "... "}, {"U", "..- "}, {"R", ".-. "}, {"W", ".-- "}, {"D", "-.. "}, {"K", "-.- "},
{"G", "--. "}, {"O", "--- "}, {"H", ".... "}, {"V", "...- "}, {"F", "..-. "}, {"L", ".-.. "},
{"P", ".--. "}, {"J", ".--- "}, {"B", "-... "}, {"X", "-..- "},
{"C", "-.-. "}, {"Y", "-.-- "}, {"Z", "--.. "}, {"Q", "--.- "}, {" ", "---- "}
};
TREENODE* TELEGRAPH::root = 0;
void TELEGRAPH::Decode(char morse[], char text[]) {
char* morsePtr;
TREENODE* node;
node = root;
cout << "Decode called" << endl;
for (morsePtr = morse; *morsePtr; morsePtr++) {
if (*morsePtr != ' ') {
if (*morsePtr == '.') {
node = node->left;
}
else if (*morsePtr == '-') {
node = node->right;
}
}
else {
node = root;
}
continue;
}
*text++ = node->letter;
return;
}
void TELEGRAPH::Encode(char text[], char[]) {
int i;
char c, *t, *morsePtr, *morse;
cout << "encode called" << endl;
cout << "\sending >>> ";
for (t = text; *t; t++) {
c = toupper(*t);
if (c == ' ') {
*morse++ = ' ';
continue;
}
for (i = 0; table[i].letter; i++) {
if (table[i].letter == c)break;
}
if (!table[i].letter) {
continue;
}
morsePtr = table[i].code;
while (*morsePtr) {
*morse++ = *morsePtr++;
}
*morse++ = ' ';
}
};
void TELEGRAPH::buildTree() {
TREENODE* node, * nextNode;
char* morsePtr;
root = new TREENODE;
if (!root) {
return;
}
root->letter = ' ';
cout << "alphabet in morse";
for (int i = 0; table[i].letter; i++) {
node = root;
for (morsePtr = table[i].code; *morsePtr; morsePtr++) {
if (*morsePtr == ' ') {
cout << *morsePtr;
nextNode = new TREENODE;
node->right = nextNode;
node = node->right;
}
else if (*morsePtr == '.') {
cout << *morsePtr;
nextNode = new TREENODE;
node->left = nextNode;
node = node->left;
}
}
}
};
int main() {
TELEGRAPH station;
char text[80], morse[600];
station.buildTree();
cout << "\enter telegram in english";
cin.getline(text, 80);
station.Encode(text, morse);
cout << morse;
cout << "message received";
station.Decode(morse, text);
cout << "message sent: " << text << endl;
station.destroyTree();
}
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