Question

There is a C function decodeMorse(const String & string, char message[]). This function examines the binary string and iteratively constructs a decimal value (val) and width of each binary pattern (separated by spaces), until a space or a null character ('\0') is encountered in the string. Once a space or a null character is found, this function should call the assembly code (decode_morse()) to obtain the corresponding ASCII value, for the current val and width, and place the ASCII value in the message array, before resetting val and width for the next binary pattern (if any).

Answer 1

//Function to convert Morse code to text
char morsecode_to_text(char input[], int index){

int index_1 = 0, index_2 = 0, x = 0;
char output[100] = {'\0'};//Variable to keep output and later used to display text
char string[50] = {'\0'};//Variable to combine output

char *characters[] = {"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", "1", "2", "3", "4", "5", "6", "7", "8", "9", "0"};


char *morsecode[] = {".-","-...","-.-.","-..",".","..-.","--.","....","..",".---", "-.-",".-..","--","-.","---",".--.","--.-",
                     ".-.","...","-","..-", "...-",".--","-..-","-.--","--..", ".----","..---","...--","....-", ".....", "-....",
                     "--...","---..","----.","-----"};


while(input[index] < 1000){
    if(input[index] != '\0'){
        if(input[index] == '.' || input[index] == '-') {
            //Compare if input Morse code is similar to Morse code in array
            while(input[index] == '.' || input[index] == '-'){
                string[index_1] = input[index];
                index += 1;
                ++index_1;
            }//end of while loop

            for(index_2=0;index_2<36;index_2++){
                if(strcmp(string, morsecode[index_2]) == 0){
                    strcat(output, characters[index_2]);
                    x = 1;}
            }//end of for loop

        memset(string,0,sizeof(string));
        //Check for spaces
        }else if(input[index] == ' '){
            if(input[index + 1] == ' ') {
                if((input[index + 2] == ' ') && (input[index + 3] == ' ')){
                    strcat(output," ");
                    index += 4;
                }else{
                    strcpy(output, "FAIL - WRONG MORSE CODE");
                    break;}
            }else
                index++;

        }else if(input[index] == '\0' || input[index] == '\n'|| input[index] != '.' || input[index] != '-'){
            break;}
    }else
        break;
}//end of while loop

if (x == 1){
printf("MORSE CODE TRANSLATED : SUCCESS - %s", output);
}else{
    strcpy(output,"FAIL - WRONG MORSE CODE");
    printf("%s", output);
}

}//end of Function to convert Morse code to text

void main()
{
    char input[1000] = {'\0'}; //User input
    char choice = 'y'; //Amount of time user wants to replay
    int index = 0;

do{
    system("cls");
    printf("MORSE CODE TRANSLATOR PROGRAM\n");
    printf("\nPlease enter a Morse code string: ");
    fgets(input,1000,stdin);

    morsecode_to_text(input, index);

printf("\n\nDo you want to try again? (Press 'y' for Yes and 'n' for No): ");
scanf("%c", &choice);
getchar();
}while(choice == 'y');//end of while loop
}//end of void main