提交时间:2026-02-07 16:52:28

运行 ID: 377801

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