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我的程序應該根據用戶的輸入生成字母模式。我必須使用遞歸來設置每個輸出不同。我已經這樣做了。接下來,我必須在另一種方法中比較兩個輸出,並使用遞歸來查找兩者之間最長公共子序列的長度。問題是我不知道如何比較它們。由於它們是無效的結果,我不知道如何將它們轉換爲字符串。我需要將void輸出轉換爲字符串,以便我可以比較兩個字符串
import java.util.Scanner;
public class patternOfLetters {
private static String letter;
public static void printLetterPattern(char letter){
char [] pattern = new char[1];
int patternLength= pattern.length;
String result="";
char start=letter;
if(start=='A'){
System.out.print('A');
result+='A';
}else if(start=='B'){
printLetterPattern('A');
System.out.print('B');
printLetterPattern('A');
}
else if(start=='C'){
printLetterPattern('B');
System.out.print('C');
printLetterPattern('B');
}
else if(start=='D'){
printLetterPattern('C');
System.out.print('D');
printLetterPattern('C');
}
}
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner in = new Scanner(System.in);
Scanner otherIn = new Scanner(System.in);
System.out.println("Enter a character to start the pattern: ");
String input = in.nextLine();
String upper = input.toUpperCase();
char letter=upper.charAt(0);
System.out.println("");
System.out.println("Your first pattern of letters is:");
printLetterPattern(letter);
System.out.println("");
System.out.println("");
System.out.println("Enter another character to generate your second pattern: ");
String input2 = in.nextLine();
String upper2 = input2.toUpperCase();
char letter2=upper2.charAt(0);
System.out.println("");
System.out.println("Your second pattern of letters is:");
printLetterPattern(letter2);
in.close();
otherIn.close();
}
} // fin。
返回然後,當你準備打印,只是做'的System.out.println(produceLetterPattern(... ))' –