Python的哦~

x=int(input())
for i in range(x):
    for _ in range(x-i-1):
        print(" ",end="")
    for _ in range(x):
        print("*",end="")
    print()

C++ :

#include <iostream>
#include <cstdio>
#define N=1000
using namespace std;

int main()
{   int n;
    scanf("%d",&n);
    for(int i=n;i>0;i--){
        for(int j=1;j<i;j++){
            printf(" ");
        }
        for(int j=1;j<=n;j++){
            printf("*");
        }
        printf("\n");
    }

    return 0;
}

a=int(input())
for i in range(1,a+1):
    print((a-i)*" ",end="")
    print(a*"*")

#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<=n;j++){
            cout<<'*';
        }
        cout<<endl;
    }
    return 0;
}