#include <iostream>
using namespace std;
int main()
{
	int i, j, n;
	char c;
	cin >> n;
	for (i = 1; i <= n; i = i + 1)
    {
		for (j = 1; j <= n - i; j += 1)
        {
			cout << " ";
		}
		for (j = 1; j <= 2 * i - 1; j += 1)
        {
			c = j + 64;
			cout << c;
		}
		cout << endl;
	}
    return 0;
}//代码已AC

也就把上题的代码改一下而已

#include <bits/stdc++.h>
using namespace std;
int n;
int main()
{
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=n-i;j++)
            cout<<" ";
        for(int j=1;j<=i*2-1;j++)
            cout<<char('A'+j-1);
        cout<<endl;
    }
    return 0;
}

#include<iostream>
using namespace std;
int n;
char a[27]={' ','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'};//打表
int main(){
    cin>>n;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n-i;j++)//输出空格
            cout<<" ";
        for(int j=1;j<=2*i-1;j++)//输出字母
            cout<<a[j];
        cout<<endl;//换行
    }
    return 0;
}//编者：Royal

一手交货，一手交赞，别忘了！！！！！！！！！！！！！！

#include
using namespace std;
int n;
int main()
{
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=n-i;j++)
            cout<<" ";
        for(int j=1;j<=i*2-1;j++)
            cout<<char('A'+j-1);
        cout<<endl;
    }
    return 0;
}

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int n, x;
    cin >> n;
    char y;
    x = n - 1;
    for (int i = 1; i <= n; i++)
    {
        y = 65;
        for (int j = 1; j <= x; j++)
        {
            cout << " ";
        }
        for (int j = 1; j <= i * 2 - 1; j++)
        {
            cout << y;
            y++;
        }
        x--;
        cout << endl;
    }
    return 0;
}

#include <iostream> using namespace std; int main() { int n; cin >> n; for (int i = 1; i <= n; i++) { for (int j = 1; j <= n - i; j++) { cout << " "; } for (int j = 1; j <= 2*i-1; j++) { cout << (char)(j+64); } cout << endl; } return 0; }