1036. 跟奥巴马一起编程(15)

注意四舍五入

#include<iostream>#include<cstdio>#include<cstring>#include<string>#include<vector>using namespace std;int main(){      double N;      char C;      while(cin>>N)      {          getchar();          C=getchar();          getchar();          for( int i=0; i<int(N/2+0.5); i++ )          {              for( int j=0; j<N; j++ )              {                  if( i==0 || i==int(N/2+0.5)-1 )                    cout<<C;                    else if( j==0 || j==N-1 )                        cout<<C;                    else                        cout<<' ';              }              cout<<endl;          }      }      return 0;}