This code uses a structure to map a letter to an equivalent representation of Morse code. It simply loops through either a string to encode or decode looking for text to substitute with a replacement string or character. Output is presented to the stdout.
Morse Code
#include <stdio.h>
#include <string.h>
#include <ctype.h>
static const struct
{
const char letter, *morse;
} 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', "--.. " },{ ' ', " " },
};
void encode(const char *s)
{
size_t i, j;
for ( i = 0; s[i]; ++i )
{
for ( j = 0; j < sizeof Code / sizeof *Code; ++j )
{
if ( toupper(s[i]) == Code[j].letter )
{
printf("%s", Code[j].morse);
break;
}
}
}
putchar('\n');
}
void decode(const char *morse)
{
size_t i, j;
for ( i = 0; morse[i]; )
{
for ( j = 0; j < sizeof Code / sizeof *Code; ++j )
{
size_t size = strlen(Code[j].morse);
if ( memcmp(Code[j].morse, &morse[i], size) == 0 )
{
putchar(Code[j].letter);
i += size;
break;
}
}
}
putchar('\n');
}
int main(void)
{
const char text[] = "Hello world";
const char test[] = ".... . .-.. .-.. --- .-- --- .-. .-.. -.. ";
encode(text);
decode(test);
return 0;
}
/* my output
.... . .-.. .-.. --- .-- --- .-. .-.. -..
HELLO WORLD
*/
Quagmire232 0 Newbie Poster
Got a turbo pascal version of this?
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