Question: Given a non-empty 2D, write a program to rotate it 90 degrees to the right. Requirement: your program is NOT allowed to allocate another array.
Given a non-empty 2D, write a program to rotate it 90 degrees to the right.
Requirement: your program is NOT allowed to allocate another array.
Explain what each line of code is doing.
Use C++.
Before:
| 1 | 2 | 3 |
| 4 | 5 | 6 |
| 7 | 8 | 9 |
After:
| 7 | 4 | 1 |
| 8 | 5 | 2 |
| 9 | 6 | 3 |
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