这是我在这个平台上的第一篇文章,我对这个Java编程有点陌生,也不擅长英语:p
我的老师要求一个莫尔斯电码翻译器,它可以对字母进行莫尔斯,反之亦然
这是我想出的代码:
import java.util.Scanner;
public class Morse2 {
public static void main(String[] args){
String[] letras = { "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"};
String[] MORSE = {
".-" ,"-...","-.-.","-.." ,"." ,
"..-.","--." ,"....",".." ,".---",
"-.-" ,".-..","--" ,"-." ,"---" ,
".--.","--.-",".-." ,"..." ,"-" ,
"..-" ,"...-",".--", "-..-","-.--",
"--.."};
System.out.println("Insira uma frase em codigo morse para uma traducao para texto ou vice-versa");
Scanner in=new Scanner(System.in);
String frase =in.nextLine();
String resp="";
frase=frase.toLowerCase();
String[] paraletras=frase.split("");
String[]paraMorse=frase.split(" ");
for(int i=0;i< paraletras.length;i++){
for(int j=0;j< letras.length ;j++){
if (paraletras[i].equals(letras[j])){
resp=resp+ MORSE[j]+" ";}
}
}
for(int k=0;k<paraMorse.length;k++){
for (int l=0;l<MORSE.length;l++){
if(paraMorse[k].equals(MORSE[l])){
resp=resp+letras[l]+ " ";}}
}
System.out.print(resp);}
}
该类编译良好,但我的输出存在一些问题,更具体地说是输出的顺序:
例如我的输入" a b -.- c " 我想要什么".- -...k -.-." 我得到了什么".- -... -.-.k"我相信那是因为我用 2 而不是 1 表示周期,但我真的不知道该怎么做。将不胜感激一些帮助此外,当用户写一个不可能的字符,如"*",我应该在那个位置放一个"?",我也在努力,我不知道我是否应该使用 if else 循环或什么
请帮助我,谢谢大家^^
是的,你是对的。这是因为您按顺序运行循环。
您需要对输入进行一次循环,然后检查一条输入是否是字母 - 从字母数组中获取翻译,如果它是来自莫尔斯数组的莫尔斯。
实际上,数组并不是最好的方法。使用一个地图要容易得多,其中字母将是一个键,MORSE 将是一个值。
那么代码可能如下所示:
public static void main(String... args) {
String[] letras = { "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" };
String[] MORSE = { ".-", "-...", "-.-.", "-..", ".", "..-.", "--.", "....", "..", ".---", "-.-", ".-..", "--",
"-.", "---", ".--.", "--.-", ".-.", "...", "-", "..-", "...-", ".--", "-..-", "-.--", "--.." };
System.out.println("Insira uma frase em codigo morse para uma traducao para texto ou vice-versa");
Map<String, String> decodeMap = new HashMap<String, String>();
for (int i=0; i< letras.length; i++)
{
decodeMap.put(letras[i], MORSE[i]);
}
Scanner in=new Scanner(System.in);
String frase =in.nextLine();
String resp = "";
frase = frase.toLowerCase();
String[] paraletras = frase.split(" ");
for (int i = 0; i < paraletras.length; i++) {
boolean gotValue = false;
for (Entry<String, String> decodeEntry: decodeMap.entrySet()) {
if (decodeEntry.getKey().equals(paraletras[i]))
{
// it is a letter print its MORSE
resp += decodeEntry.getValue();
gotValue = true;
break;
} else if (decodeEntry.getValue().equals(paraletras[i]))
{
// it is a MORSE - print its letter
resp += decodeEntry.getKey();
gotValue = true;
break;
}
}
if (gotValue)
{
resp += " ";
}
}
System.out.print(resp);
}
你必须评估每个组或字符来猜测它是否是莫尔斯。
Example:
First group: 'a'
is morse -> no
is a letter -> yes -> then convert to morse
Second group: 'b'
is morse -> no
is a letter -> yes -> then convert to morse
Third group: '-.-'
is morse -> yes -> then convert to letter
这段代码可能更有效,但我认为它很容易理解。我希望这能帮助你提高你的编程技能。
import java.util.Scanner;
public class Morse2 {
public static void main(String[] args) {
String[] LETRAS = {
"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" };
String[] MORSE = {
".-", "-...", "-.-.", "-..", ".", "..-.",
"--.", "....", "..", ".---", "-.-", ".-..",
"--", "-.", "---", ".--.", "--.-", ".-.",
"...", "-", "..-", "...-", ".--", "-..-",
"-.--", "--.." };
System.out.println("Insira uma frase em codigo morse para uma traducao para texto ou vice-versa");
Scanner in=new Scanner(System.in);
String frase =in.nextLine();
String resp = "";
frase = frase.trim().toLowerCase();
String[] chars = frase.split(" ");
for (int i = 0; i < chars.length; i++) {
String group = chars[i];
String newChar = null;
for (int j = 0; j < LETRAS.length; j++) {
if (LETRAS[j].equals(group)) {
newChar = MORSE[j];
break;
}
}
if (newChar == null) {
for (int j = 0; j < MORSE.length; j++) {
if (MORSE[j].equals(group)) {
newChar = LETRAS[j];
break;
}
}
}
if (newChar == null) {
System.out.println("Group not found: "+group);
continue;
}
resp += newChar + " ";
}
System.out.print(resp);
in.close();
}
}
很抱歉成为这样的菜鸟,但可能也是因为我从 8 小时前就在这里,但为什么这段代码只给了我几次字母"a"的摩尔斯电码?
import java.util.Scanner;
public class Morse2 {
public static void main(String[] args){
String[] abecedario = { "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"};
String[] MORSE = {
".-" ,"-...","-.-.","-.." ,"." ,
"..-.","--." ,"....",".." ,".---",
"-.-" ,".-..","--" ,"-." ,"---" ,
".--.","--.-",".-." ,"..." ,"-" ,
"..-" ,"...-",".--", "-..-","-.--",
"--.."};
System.out.println("Insira uma frase em codigo morse para uma traducao para texto ou vice-versa");
Scanner in=new Scanner(System.in);
String frase =in.nextLine();
String resp="";
frase=frase.toLowerCase();
String[] palavra=frase.split(" ");
for(int i=0;i< palavra.length;i++){
String letra=palavra[i];
String novochar="";
for (int j=0;j<abecedario.length;j++){
if (abecedario[j].equals(letra));
novochar=MORSE[j];
break;
}
if(novochar==""){
for (int j=0;j<MORSE.length;j++){
if (MORSE[j].equals(letra));
novochar=abecedario[j];
break;
}
}
if(novochar==""){
novochar="?";
continue;
}
resp=resp+novochar+" ";
}
System.out.println(resp);
}
}