I have a question about why something is being done in the provided stub code for Tideman.

here `bool locked[MAX][MAX]` is left uninitialized early in the program when it is declared. Later every element of `locked` is assigned `false` in `main` using for loops.

I have learned the default value of booleans is false, so it seems to me `locked` doesn't need to be assigned `false` explicitly. Would you teach me for what purpose `locked` is assigned `false` in this program?


```
/// some code, it defines MAX 

// locked[i][j] means i is locked in over j
bool locked[MAX][MAX];

/// more code introduces `candidate_count`

int main(int argc, string argv[])
{
    /// some code here
    /// notably it assigns `candidate_count` to a value less than `MAX`

    // Clear graph of locked in pairs
    for (int i = 0; i < candidate_count; i++)
    {
        for (int j = 0; j < candidate_count; j++)
        {
            locked[i][j] = false;
        }
    }

    /// more code follows
}
```