将三角形的每行拆开，找规律

以样例为例子：

第一行：两个空格一个*

第二行：一个空格三个*

第三行：零个空格五个*

空格变化：2, 1, 0

规律：从 n-1 往下递减1，直到0

*号变化：1, 3, 5

规律：从 1 往下递增2，加 n - 1 次（第一次是1）

#include <iostream>
#include <stack>
#include <cmath>
#include <vector>
#include <string.h>
#include <queue>
#include <stdio.h>
#include <iomanip>
#include <cstdio>
#include <algorithm>
#define int long long
using namespace std;
const int N = 1e5 + 10;
signed main()
{
	int n;
	cin >> n;
	for(int i = 1; i <= n; i++)
    {
        for(int j = 1; j <= n - i; j++)//求左边的空格数
        {
            cout << " ";
        }
        for(int j = 1; j <= 1 + (i - 1) * 2; j++)//求*数
        {
            cout << "*";
        }
        puts("");
    } 
}

#include <iostream>
using namespace std;
short n;
int main()
{
	cin >> n;
	n = n * 2 - 1;
	short mid = 1,sig = (n - mid) / 2;
	for (int i = 1;i <= (n + 1) / 2;i++)
	{
		for (int j = 1;j <= sig;j++)
			cout << ' ';
		for (int j = 1;j <= mid;j++)
			cout << '*';
		for (int j = 1;j <= sig;j++)
			cout << ' ';
		cout << endl;
		mid += 2;
		sig--;
	}
	return 0;
}

#include <iostream>
#include <stack>
#include <cmath>
#include <vector>
#include <string.h>
#include <queue>
#include <stdio.h>
#include <iomanip>
#include <cstdio>
#include <algorithm>
#define int long long
using namespace std;
const int N = 1e5 + 10;
signed main()
{
	int n;
	cin >> n;
	for(int i = 1; i <= n; i++)
    {
        for(int j = 1; j <= n - i; j++)//求左边的空格数
        {
            cout << " ";
        }
        for(int j = 1; j <= 1 + (i - 1) * 2; j++)//求*数
        {
            cout << "*";
        }
        puts("");
    } 
}

using namespace std;
const int N = 1e5 + 10;
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 <= 2*i-1; j++)
		{
			cout << "*";
		}
		cout << endl;
	}
	return 0;
} 

#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-1;j++){
    if(n-i+1<=j&&n+i>=j)cout<<"*";
    else cout<<" ";
    }
    cout<<endl;
    }
}

#include<bits/stdc++.h>;

 using namespace std;

 int main() {

    int n;

    cin>>n;

    for(int i=1;i<=n;i++){

    for(int j=1;j<=n+i-1;j++){

    if(n-i+1<=j&&n+i>=j)cout<<"*";

    else cout<<" ";

    }

    cout<<endl;

    }

}

#include 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 << "*"; } cout << endl; } }

#include <bits/stdc++.h>
using namespace std;
int n,sum;
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+sum;j++){
	cout<<"*";
		}
	sum++;
	cout<<endl;
	}
	return 0;
}

int a; cin>>a; for(int i=1;i<=a;i++){ for(int j=1;j<=a-i;j++){ cout<<" "; } for(int j=1;j<=1+(i-1)2;j++){ cout<<""; } cout<<endl; }

#include <iostream>
#include <stack>
#include <cmath>
#include <vector>
#include <string.h>
#include <queue>
#include <stdio.h>
#include <iomanip>
#include <cstdio>
#include <algorithm>
#define int long long
using namespace std;
const int N = 1e5 + 10;
signed main()
{
	int n;
	cin >> n;
	for(int i = 1; i <= n; i++)
    {
        for(int j = 1; j <= n - i; j++)//求左边的空格数
        {
            cout << " ";
        }
        for(int j = 1; j <= 1 + (i - 1) * 2; j++)//求*数
        {
            cout << "*";
        }
        puts("");
    } 
}

#include <iostream>
#include <stack>
#include <cmath>
#include <vector>
#include <string.h>
#include <queue>
#include <stdio.h>
#include <iomanip>
#include <cstdio>
#include <algorithm>
#define int long long
using namespace std;
const int N = 1e5 + 10;
signed 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 <= 1 + (i - 1) * 2; j++)
        {
            cout << "*";
        }
        cout << endl ; 
    } 
}













































































////////////////////////////////

#include <iostream>
#include <bits/stdc++.h>
using namespace std;
const int N=1e7+10;
const int INF=0x3f3f3f3f;
int main()
{
	int a,bu;
	cin>>a;
	bu=2*a-1;
	int g=0,z=bu/2+1;
	for(int i=1;i<=a;i++) 
	{
		for(int j=1;j<=bu;j++)
		{
			if(j<=z+g && j>=z-g)
			{
				cout<<'*';
			}
			else
			{
				cout<<' ';
			}
		}
		cout<<endl;
		g++;
	}
	
}

#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 <=  2*i - 1;j++)
{
	cout << "*";
}
cout << endl;

}

return 0;

}

#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<=2*i-1;j++)
		{
			cout<<"*";
		}
		cout<<endl;
	}
	
	return 0;
}

#include

#include<stdio.h>

#include<math.h>

#include

#include<string.h>

#include

using namespace std; int main() {

int n;

cin>>n;

for(int i=1;i<=n;i++)
{
	for(int j=1;j<=n+i-1;j++)
	{
	    if(n-i+1<=j&&n+i>=j)

	
		 cout<<"*";
		 
	    else cout<<" ";
	}
	cout<<endl;
}

}

#include<iostream>
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<<"*";
		}
	    cout<<endl; 
	}
	
	return 0;
}

#include #include <stdio.h> using namespace std; int main () { int n; cin >> n; for (int i = 1 ; i <= n ; i ++) { for (int j = 1 ; j <= n + i - 1 ; j ++) { if (n - i + 1 <= j && n + i >= j) cout << "*"; else cout << " "; } cout << endl; } }