GCC

#include <stdio.h>
char c;
int main()
{
	c = getchar();
	printf("  %c\n %c%c%c\n%c%c%c%c%c\n", c, c, c, c, c, c, c, c, c);
	return 0;
}

#include<iostream>
using namespace std;
int main()
{
	char a;
	cin>>a;
	for(int i=1;i<=3;i++)
	{
		for(int j=1;j<=3-i;j++) cout<<" ";
		for(int j=1;j<=3-(3-i);j++) cout<<a;
		for(int j=2;j<=3-(3-i);j++) cout<<a;
		cout<<endl;
	}
	return 0;
}
//普通代码

# include <bits/stdc++.h>
using namespace std;int main(){char ch;cin>>ch;printf("  %c\n %c%c%c\n%c%c%c%c%c",ch,ch,ch,ch,ch,ch,ch,ch,ch);return 0;} 

极简写法

#include using namespace std; int main() { char a; cin >> a; for (int i = 1; i <= 3;i++) { for (int j = i; j <= 3-1; j++) { cout << " ";

	} 
	for (int l = 1; l <= i; l++)
	{
		if(l >= 2)
		{
			cout << a;
		}
		cout << a; 
	} 
	cout << endl;
}

}

#include<bits/stdc++.h>
#include<cstring>
#include<queue>
#include<set>
#include<stack>
#include<vector>
#define ll long long
using namespace std;
const int N=1e5+10;
const int M=2023;
const int inf=0x3f3f3f3f;
char x,y,z;
int main()
{
	cin>>x;
	printf("%3c\n",x);
	printf("%2c%c%c\n",x,x,x);
	printf("%c%c%c%c%c",x,x,x,x,x);
	return 0;
}
       
       ```

#include

using namespace std;

int main()

{

char a;

cin>>a;

cout<<" "<<a<<endl;

cout<<" "<<a<<a<<a<<endl;

cout<<a<<a<<a<<a<<a;

return 0;

}

#include<iostream>
using namespace std;
int main()
{
	char a;
	cin>>a;
	for(int i=1;i<=3;i++)
	{
		for(int j=1;j<=3-i;j++) cout<<" ";
		for(int j=1;j<=3-(3-i);j++) cout<<a;
		for(int j=2;j<=3-(3-i);j++) cout<<a;
		cout<<endl;
	}
	return 0;
}

或者是

#include<iostream>
using namespace std;
int main()
{
	char a;
	cin>>a;
	cout<<"  "<<a<<endl<<" "<<a<<a<<a<<endl<<a<<a<<a<<a<<a;
	return 0;
}