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  1. #include<bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. int main() {
  6.  
  7.   int rows, cols;
  8.   // Getting dimensions of rectangle.
  9.   cout << "Enter the number of rows in rectangle - ";
  10.   cin >> rows;
  11.  
  12.   cout << "Enter the number of columns in rectangle - ";
  13.   cin >> cols;
  14.  
  15.   cout << "Rectangle of dimensions " << rows << "*" << cols << endl;
  16.  
  17.   // Main logic to print hollow rectangle. 
  18.   for (int i = 0; i < rows; i++) {
  19.     for (int j = 0; j < cols; j++) {
  20.  
  21.       // If the index is at the border, then print *. 
  22.       if (i == 0 || i == rows - 1 || j == 0 || j == cols - 1)
  23.         cout << "* ";
  24.       else
  25.         cout << "  ";
  26.     }
  27.     cout << endl;
  28.   }
  29.  
  30.   return 0;
  31. }
  32.  
Success #stdin #stdout 0.01s 5280KB
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stdin
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7
5
7*5
stdout
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Enter the number of rows in rectangle - Enter the number of columns in rectangle - Rectangle of dimensions 7*5
* * * * * 
*       * 
*       * 
*       * 
*       * 
*       * 
* * * * *
https://ideone.com/dqDiKB
language:
C++ (gcc 8.3)
created:
12 days ago
visibility:
public

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