Question

The Morese code was developed by Alfred Vail while he is working in 1830 with Samuel Morse in the invention of electric

telegraph . Vail created a method by which each letter or number was transmitted individually with a consistent code stripes

Y points , Ie telegraphic signals that differ in the duration of the active signal. Morse recognized the suitability of this

system and he patented together with the electric telegraph. It was known as American Morse Code and was used in the

first transmission by telegraph.

You will write a program that reads a message and should be stored in an array of strings, the strings representing each of

the characters of the message:

Example:

If the message is "Hello World", you should analyze character by character to arm the individual chains:

H - "· ·," O = "- - -" L = "· - ·" A = "· -" etc etc ...

-	-	-	-	\ 0
.	.	.	.	\ 0
-	.	-	-	\ 0
-	.	\ 0

The program should read a string, you must determine the sequence of dots and dashes of each character and save in the array of strings.

Now, lets encrypt the message. In a copy of the settlement, you must place the strings, just that the dots will be dashes and dashes will be points

-	-	-	-	\ 0
.	.	.	.	\ 0
-	.	-	-	\ 0
-	.	\ 0

Finally you must interpret the new codes:

"- - - -" = O

". . . . "= H

"-. -. "= C

"-. "= N

The individual characters are going to put together a string.

You must write a program that has two options:

a) can read a character string ( only alphanumeric and spaces) and

encoding according to the above rules.

b) You can read an encoded according to the above rule and restore the original text message.

The program must be on code C

Answer 1

#include<stdio.h>

#include<string.h>

#define SIZE 100

void encode(const char *enmorse[], const char *enAph[], const char *enaph[]);

void decode(const char *enmorse[], const char *enAph[], const char *enaph[]);

int main()

{

const char *morse[27]={"._","_...","___.","_..",".",".._.","__.","....","..",".___","_._","._..","____","_.","___",".__.","__._","._.","...","_",".._","..._",".__","_.._","_.__","__..","..__"};

const char *Aph[27]={"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"," "};

const char *aph[27]={"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"," "};

char string[SIZE];

int s;

printf("1. Morse Code Encoding\n2. Morse Code Decoding\nSelect 1 or 2:");

scanf("%d", &s);

fgets(string, SIZE, stdin);

if(s==1)

encode(morse, Aph, aph);

else if(s==2)

decode(morse, Aph, aph);

else

printf("please key in 1 or 2 , try it again\n");

printf("\n");

return 0;

}

void encode(const char *enmorse[], const char *enAph[], const char *enaph[])

{

char string[SIZE];

char c;

int i;

int j;

int s=0;

printf("Enter the messages then convert to the Morse codes\n");

fgets(string, SIZE, stdin);

for(i=0; i<SIZE; i++) {

for(j=0; j<27; j++) {

if((string[i]==*enAph[j])||(string[i]==*enaph[j]))

printf("%s ",enmorse[j]);

}

}

}

void decode(const char *enmorse[],const char *enAph[],const char *enaph[] )

{

char string[SIZE];

char *tokenPtr;

char s[SIZE];

int i;

printf("Enter the Morse codes then convert to the messages\n");

  

fgets(string, SIZE, stdin);

tokenPtr=strtok(string," ");

while (tokenPtr!= NULL) {

for(i=0;i<27;i++) {

strcmp(tokenPtr,enmorse[i]);

if(strcmp(tokenPtr,enmorse[i])==0)

printf("%s",enaph[i]);

}

tokenPtr=strtok(NULL," ");

}

}