解题思路:
参考代码:
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); //输入一个数N,N<= 26 int N = scanner.nextInt(); //规律: //A1 = "A" A //A2 = "ABA" A B A //A3 = "ABACABA" ABA C ABA //A4 = "ABACABADABACABA" ABACABA D ABACABA //.... //'A'-65,'a'-97 int num = 65; String str = ""; for (int i = 0; i < N; i++) { //先把num + i转换为字符,再和字符串拼接 //i = 0 num + 0 = 65-'A' //i = 1 num + 1 = 66-'B'依次下去 str = str + (char)(num + i) + str;//利用字符串拼接 if (i == N - 1) { System.out.println(str); } } } }
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