Hi everyone:

I am fairly new to c++. I have created a dynamic array, but I am having trouble initializing it. My goal is to create a grid, and then assign an initial condition (for example, initial temperature = some value) on the grid points.

I know that it would be straightforward to use a vector, for example:

`vector<double> u(I, 0.5);`

but I need to use an array in this case.

Here is what I've done so far:

```
int I;
int i;
double* u ;
u = new double[I*sizeof(double)];
for( i=0 ; i < I ; i++ )
{
e = 0.5;
u[i] = e; // I have also tried u[i] = {0.5};
cout << "The vector u[i] contains:\n";
for (i=0 ; i < I ; i++ )
{
cout << u[i] << endl;
}
}
```

The problem is that the result is this:

The vector u* contains:
0
0.5
0
0
0
0
0
0
0
0
logout*

I would very much appreciate it if anyone could suggest why only one of the grid points has the value I want (0.5) and what I might do to assign 0.5 on all the grid points.

Thank you for your help.