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  1. #include <iostream>
  2. #include<string>
  3.  
  4. int main() {
  5.     const std::size_t rows = 30;
  6.     const std::size_t cols = 70;
  7.  
  8.     std::string pattern[rows];
  9.  
  10.     // initialize strings in pattern to be of length "cols" and all spaces:
  11.     for (std::size_t i = 0; i < rows; ++i)
  12.         pattern[i] = std::string(cols, ' ');
  13.  
  14.     // top/bottom:
  15.     for (std::size_t i = 0; i < cols; ++i)
  16.         pattern[0][i] = pattern[rows - 1][i] = 'x';
  17.  
  18.     // left/right:
  19.     for (std::size_t i = 1; i < rows - 1; ++i)
  20.         pattern[i][0] = pattern[i][cols - 1] = 'x';
  21.  
  22.     // print the pattern out, taking advantage of the fact that each row is a string and
  23.     // cout knows how to print the whole row:
  24.     for (std::size_t row = 0; row < rows; ++row)
  25.         std::cout << pattern[row] << '\n';
  26.  
  27.     std::cout << '\n';
  28.     std::cin.ignore(100, '\n');
  29.  
  30.     // We want to insert "Hello" into the box without distorting the boundary:
  31.     {
  32.         std::size_t insertion_row = 5;
  33.         std::size_t insertion_col = 5;
  34.         std::string insert_me = "Hello";
  35.  
  36.         for (std::size_t i = 0; i < insert_me.length(); ++i)
  37.             pattern[insertion_row][insertion_col + i] = insert_me[i];
  38.     }
  39.  
  40.     // See our handiwork
  41.     for (std::size_t row = 0; row < rows; ++row)
  42.         std::cout << pattern[row] << '\n';
  43.  
  44.     std::cout << '\n';
  45.     std::cin.ignore(100, '\n');
  46.  
  47.     // An alternate way to insert text:
  48.     {
  49.         std::size_t insertion_row = 10;
  50.         std::size_t insertion_col = 5;
  51.         std::string insert_me = "Goodbye";
  52.  
  53.         pattern[insertion_row].replace(insertion_col, insert_me.length(), insert_me);
  54.     }
  55.  
  56.     // See our handiwork
  57.     for (std::size_t row = 0; row < rows; ++row)
  58.         std::cout << pattern[row] << '\n';
  59.  
  60.     std::cout << '\n';
  61. }
Success #stdin #stdout 0s 3468KB
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https://ideone.com/Gm8TcZ
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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