OpenJudge 1.1编程基础之输入输出 09: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; 
}