题解 | 牛牛的字符菱形

#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;

}