输入:5
输出:
A
ABA
ABCBA
ABCDCBA
ABCDEDCBA
输入:5
输出:
A
ABA
ABCBA
ABCDCBA
ABCDEDCBA
#include <stdio.h>
#include <iostream>
using namespace std;
int main() {
int N;
cin >> N;
for (int i = 0; i < N; i++)
{
for (int j = 0; j < N - i; j++) printf(" ");
for (int j = 0; j < i; j++) printf("%c", (char)(j + 'A'));
for (int j = i; j >= 0; j--) printf("%c", (char)(j + 'A'));
printf("\n");
}
return 0;
}