about delete keyword

[vFreeman]

Hello , I just wonder how I can delete a parameter in a function .
As below ;

int *buildTrail(int antIndex, int start, double *pheromones)
{
    int *trail = new int[tabu];
    bool *visited = new bool[tabu];
    trail[0] = start;
    visited[start] = true;
    for (int i = 0; i < tabu - 1; ++i)
    {
        int currentPixel = trail[i];
        int nextPixel = ++currentPixel /*= NextCity(antIndex, currentPixel, visited, pheromones)*/;
        trail[i + 1] = nextPixel;
        visited[nextPixel] = true;
    }
    return trail;
}

If i comment all lines includes visited word , no exception occurs ,
Otherwise , exception throws.

Simply put , How can i delete visited parameter as long as its role has been finished?

.
.
.
   delete visited ;
   return trail;

[abhishekm71]

delete [] visited;

Be sure that this statement is placed after all possible accesses to the array. Alternatively, use vectors.

[vFreeman]

I tried but does not work.

I write delete[] before "return trail".

[PadMad]

"delete [] visited;" should work.

[ne555]

std::vector<int>
buildTrail(int antIndex, int start, double *pheromones){
   std::vector<int> trail( tabu );
   std::vector<bool> visited( tabu );
   //...
   return trail;
}

> If i comment all lines includes visited word , no exception occurs ,
> Otherwise , exception throws.
unless it is throwing `std::bad_alloc' after you run out of memory, a memory leak would not cause an exception to be thrown.


delete is different than delete[]

new is different than new[]