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  1. #include <iostream>
  2.  
  3. void printGrid(bool (&a)[10][10])
  4. {
  5.     static_assert(10 == sizeof(a) / sizeof(*a), "unexpected size");
  6.  
  7.     for(std::size_t i = 0; i < sizeof(a) / (sizeof(*a)); i++) {
  8.         for(std::size_t j = 0; j < sizeof(a) / (sizeof(*a)); j++) {
  9.             char x = a[i][j] ? '#' : '?';
  10.             std::cout << x;
  11.         }
  12.         std::cout << std::endl;
  13.     }
  14. }
  15. int main()
  16. {
  17.     bool grid[10][10];
  18.     for(std::size_t i = 0; i < sizeof(grid) / sizeof(*grid); i++) {
  19.         for(std::size_t j = 0; j < sizeof(grid) / sizeof(*grid); j++) {
  20.  
  21.             grid[i][j] = true;
  22.         }
  23.     }
  24.     printGrid(grid);                                      // this doesn't work
  25.     std::cout << ((grid[0][1]) ? "#" : "?") << std::endl; // this works fine
  26. }
  27.  
Success #stdin #stdout 0s 3296KB
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Standard input is empty
stdout
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#
https://ideone.com/aU8Il1
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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