#include <bits/stdc++.h> using namespace std; int main() { char a;//设置字符类型的变量。 cin>>a;//输入。 cout<<" "<<" "<<a<<endl;//每行换行 cout<<" "<<a<<a<<a<<endl; cout<<a<<a<<a<<a<<a<<endl; cout<<" "<<a<<a<<a<<endl; cout<<" "<<" "<<a<<endl;

return 0;

这要是不会，我……

#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 << endl;
	return 0;
}