题目：

解答：

#define _CRT_SECURE_NO_WARNINGS 1
#include<iostream>
#include<string>
using namespace std;

int main()
{
  char c;//将数字和字符都考虑进去
  cin >> c;
  if (c >= 'A' && c <= 'Z')//字符类型，else就是数字
  {
    for (int row=1;row<=c-'A'+1; row++)
    {
      //先考虑空格
      string space = string(c - 'A' + 1 - row, ' ');
      cout << space;
      for (int m=1;m<row;m++)
      {
        cout << (char)('A' + m - 1);//基准都是从A开始
        }
      cout << (char)('A' + row - 1);//cout打印字符加减时，需要强制类型转换
      for (int m = 1; m < row; m++)
      {
        cout << (char)('A'+row-1 - m);//反向打印
      }
      cout << endl;//换行
    }
  }
  else
  {
    //数字状况，直接将A变为1
    for (int row = 1; row <= c - '1' + 1; row++)
    {
      string space = string(c - '1' + 1 - row, ' ');
      cout << space;
      for (int m = 1; m < row; m++)
      {
        cout << (char)('1' + m - 1);
      }
      cout << (char)('1' + row - 1);
        for (int m = 1; m < row; m++)
      {
        cout << (char)('1' + row - 1 - m);
      }
      cout << endl;
    }
  }
  return 0;
}