字符金字塔

#include<iostream>
#include<string>
using namespace std;

int main() {	//1 3 5 7   2n-1
	int n;
	cin >> n;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= 2 * n - 1; j++) {
			if (j <= n - i || j > n-1+i)
				cout << " ";
			else
				cout << (char)(i + 64);
		}
		cout<<""<< endl;
	}
	return 0;
}

//00100
//02220
//33333

测试结果：