疯狂if语句 太简单了 话不多说，上代码！

#include<iostream>
using namespace std;
int main()
{
    int n;
    cin>>n;
    if(n == 1)
    {
        cout<<"A";
    }
    if(n == 2)
    {
        cout<<"A"<<endl;
        cout<<"AB"<<endl;
    }
    if(n == 3)
    {
        cout<<"A"<<endl;
        cout<<"AB"<<endl;
        cout<<"ABC"<<endl;
    }
    if(n == 4)
    {
        cout<<"A"<<endl;
        cout<<"AB"<<endl;
        cout<<"ABC"<<endl;
        cout<<"ABCD"<<endl;
    }
    if(n == 5)
    {
        cout<<"A"<<endl;
        cout<<"AB"<<endl;
        cout<<"ABC"<<endl;
        cout<<"ABCD"<<endl;
        cout<<"ABCDE"<<endl;
    }
    if(n == 6)
    {
        cout<<"A"<<endl;
        cout<<"AB"<<endl;
        cout<<"ABC"<<endl;
        cout<<"ABCD"<<endl;
        cout<<"ABCDE"<<endl;
        cout<<"ABCDEF"<<endl;
    }
    if(n == 7)
    {
        cout<<"A"<<endl;
        cout<<"AB"<<endl;
        cout<<"ABC"<<endl;
        cout<<"ABCD"<<endl;
        cout<<"ABCDE"<<endl;
        cout<<"ABCDEF"<<endl;
        cout<<"ABCDEFG"<<endl;
    }
    if(n == 8)
    {
        cout<<"A"<<endl;
        cout<<"AB"<<endl;
        cout<<"ABC"<<endl;
        cout<<"ABCD"<<endl;
        cout<<"ABCDE"<<endl;
        cout<<"ABCDEF"<<endl;
        cout<<"ABCDEFG"<<endl;
        cout<<"ABCDEFGH"<<endl;
    }
    if(n == 9)
    {
        cout<<"A"<<endl;
        cout<<"AB"<<endl;
        cout<<"ABC"<<endl;
        cout<<"ABCD"<<endl;
        cout<<"ABCDE"<<endl;
        cout<<"ABCDEF"<<endl;
        cout<<"ABCDEFG"<<endl;
        cout<<"ABCDEFGH"<<endl;
        cout<<"ABCDEFGHI"<<endl;
    }
    return 0;
}

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

#include <cstdio>
using namespace std;
int main(){
    int n;
    scanf("%d",&n);
    for(int i=1;i<=n;i++){
        for(int j=0;j<i;j++)printf("%c",j+'A');
        printf("\n");
    }
    return 0;
}

其实就是我在【入门】字母直角2中发布的题解中第7行的i改成j

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

已Accept~~