附带解析

#include <bits/stdc++.h> using namespace std; int main(){ int n; cin>>n; for (int i=1;i<=n;i++){ int cnt=1,c=n-i+1; for (int j=1;j<=i-1;j++) cout<<" "; while (c>0){ cout<<setw(5)<<cnt; cnt++; c--; } cout<<endl; } return 0; }