| ### Compilation failed: | |
| error: 1: array size must be an integer | |
| int a[1, 2]; | |
| ^^^^ | |
| error: 2: array size must be an integer | |
| int b[(3, 4)]; | |
| ^^^^^^ | |
| error: 3: 'const' variable initializer must be a constant expression | |
| const int d = (5, 6); | |
| ^^^^^^ | |
| 3 errors |