PAT乙级1036 跟奥巴马一起学编程

#include <iostream>using namespace std;int main(){    float N;    int m;    char c;    cin>>N;    cin>>c;    m=(N/2+0.5);    for(int i=0;i<m;i++){        for(int j=0;j<N;j++){            if(i==0||i==m-1){                cout<<c;            }else if(j==0||j==N-1){                cout<<c;            }else{                cout<<" ";            }            if(j==N-1){                cout<<endl;            }        }    }    return 0;}