记住四舍五入这个点,判断n的奇偶性
#include <iostream>
#include<cstring>
#include<algorithm>
#include<cstdlib>
using namespace std;
int main()
{
int n;
char ch;
int m;
cin>>n>>ch;
if(n%2==0) m=n/2;
else m=n/2+1;
for(int i=0;i<n; i++)
{
cout<<ch;
}
cout<<endl;
for(int j=0; j<m-2; j++)
{
for(int i=0; i<n; i++)
{
if(i==0||i==n-1)
cout<<ch;
else cout<<" ";
}
cout<<endl;
}
for(int i=0; i<n; i++)
{
cout<<ch;
}
cout<<endl;
return 0;
}