[BASIC-3]-字母图形-(java)

import java.util.Scanner;public class Main{public static void main(String[] args) {int n;int m;Scanner scan = new Scanner(System.in);n = scan.nextInt();m = scan.nextInt();char ch = 'A';for(int i=0; i<n; ++i){for(int j=i; j>0 && i-j<m; --j) //这里很容易出错，当n大于m的情况要考虑{System.out.print((char)(ch+j));}for(int k=0; k<m-i; ++k){System.out.print((char)(ch+k));}System.out.println();}}}