谢谢大家，不要抄袭哈，不喜勿喷

想必很多人是复制题解的吧。（那必须的） 开个玩笑

#include<iostream> using namespace std;int main(){int n;cin>>n;for(int i=1;i<=n;i++){for(int k=1;k<=n-i;k++)cout<<" ";for(int j=1;j<=2i-1;j++){if(j1 or j2i-1)cout<<'';else cout<<" ";}cout<<endl;} for(int i=n-1;i>=1;i--){for(int k=1;k<=n-i;k++)cout<<" ";for(int j=1;j<=2i-1;j++){if(j1 or j2i-1)cout<<'';else cout<<" ";}cout<<endl;}}

#include<iostream> using namespace std; int main(){ int n; cin>>n; char a=''; for(int i=1;i<=n;i++){ for(int k=1;k<=n-i;k++){ cout<<" "; } for(int j=1;j<=2i-1;j++){ if(j1 or j2i-1){ cout<<a; }else{ cout<<" "; } } cout<<endl; } for(int i=n-1;i>=1;i--){ for(int k=1;k<=n-i;k++){ cout<<" "; } for(int j=1;j<=2i-1;j++){ if(j1 or j2*i-1){ cout<<a; }else{ cout<<" "; } } cout<<endl; } return 0; }

#include<iostream> using namespace std; int main(){ int n; cin>>n; for(int i=1;i<=n;i++){ for(int k=1;k<=n-i;k++){ cout<<" "; } for(int j=1;j<=2i-1;j++){ if(j1 or j2i-1){ cout<<'*'; }else{ cout<<" "; } }

#include<bits/stdc++.h> using namespace std; int n,f; int main() { cin>>n; for(int i=1; i<=n; i++) { for(int j=0; j<n-i; j++) { cout<<' '; } cout<<''; short k=i2-1; if(k!=1) { for(int j=0; j<k-2; j++) { cout<<' '; } cout<<''; } cout<<endl; } for(int i=n-1; i>=1; i--) { for(int j=0; j<n-i; j++) { cout<<' '; } cout<<''; short k=i2-1; if(k!=1) { for(int j=0; j<k-2; j++) { cout<<' '; } cout<<''; } cout<<endl; } return 0; }

#include<bits/stdc++.h> using namespace std; int main(){ int a,b,c=1; cin>>a; b=a-2; for(int i=1;i<=a-1;i++){ cout<<" "; } cout<<""<<endl; for(int i=1;i<=a-1;i++){ for(int u=1;u<=b;u++){ cout<<" "; } cout<<""; for(int h=1;h<=c;h++){ cout<<" "; } cout<<""<<endl; b--; c+=2; } b=1; c-=4; for(int i=1;i<=a-2;i++){ for(int u=1;u<=b;u++){ cout<<" "; } cout<<""; for(int h=1;h<=c;h++){ cout<<" "; } cout<<""<<endl; b++; c-=2; } for(int i=1;i<=a-1;i++){ cout<<" "; } cout<<""; return 0; }