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  1. // Hollow Rectangle Pattern
  2.  
  3. #include<bits/stdc++.h>
  4.  
  5. using namespace std;
  6.  
  7. int main() {
  8.  
  9.   int rows, cols;
  10.   // Getting dimensions of rectangle.
  11.   cout << "Enter the number of rows in rectangle - ";
  12.   cin >> rows;
  13.  
  14.   cout << "Enter the number of columns in rectangle - ";
  15.   cin >> cols;
  16.  
  17.   cout << "Rectangle of dimensions " << rows << "*" << cols << endl;
  18.  
  19.   // Main logic to print hollow rectangle. 
  20.   for (int i = 0; i < rows; i++) {
  21.     for (int j = 0; j < cols; j++) {
  22.  
  23.       // If the index is at the border, then print *. 
  24.       if (i == 0 || i == rows - 1 || j == 0 || j == cols - 1)
  25.         cout << "* ";
  26.       else
  27.         cout << "  ";
  28.     }
  29.     cout << endl;
  30.   }
  31.  
  32.   return 0;
  33. }
  34.  
Success #stdin #stdout 0s 5304KB
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stdin
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4
6
stdout
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Enter the number of rows in rectangle - Enter the number of columns in rectangle - Rectangle of dimensions 4*6
* * * * * * 
*         * 
*         * 
* * * * * *
https://ideone.com/fITqeQ
language:
C++ (gcc 8.3)
created:
12 days ago
visibility:
public

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