画表格

 #include <iostream>
 #include <string>
 using namespace std;
 int main()
 {
     string a[11]={"┌","┬","┐","├","┼","┤","└","┴","┘","│","─"};
     int m,n;
     //cout<<a[0]<<endl;

     while (cin>>m>>n)
     {

             if(m!=0&&n!=0)
             for(int i=0;i<=2*m;i++)
             {

                 for(int j=0;j<=2*n;j++)
                 {

                     if(i==0&&j==0)
                     cout<<a[0];

                     else if(i==2*m&&j==2*n)
                     cout<<a[8];
                     else if(i==0&&j==2*n)
                     cout<<a[2];
                     else if(i%2==1&&j%2==0)
                     cout<<a[9];
                     else if(i%2==0&&j%2==1)
                     cout<<a[10];
                     else if(i%2==1&&j%2==1)
                     cout<<"  ";
                     else if(i==2*m&&j==0)
                     cout<<a[6];
                     else if(i%2==0&&j%2==0&&j!=0&&i!=0&&i!=2*m&&j!=2*n)
                     cout<<a[4];
                     else if(i==0&&j%2==0&&j!=0&&j!=2*n)
                     cout<<a[1];
                     else if(j==0&&i%2==0&&i!=0&&i!=2*m)
                     cout<<a[3];

                     else if(j==2*n&&i%2==0&&i!=0&&i!=2*m)
                     cout<<a[5];

                     else  if(i==2*m&&j%2==0&&j!=0&&j!=2*n)
                     cout<<a[7];


                     if(j==2*n)
                     cout<<endl;
                     //else break;


                 }
                 if(i==2*m)
                     cout<<endl;
             }
             else break;


     }
     return 0;
 }