Help with variables

Ok, so this is my problem:

double dec1 = 5.76;
string varDecName = "dec1";

Now, using varDecName, how can I access the 5.76 for use in calculations?

[EDIT:] I decided to go a simpler route and just used arrays. My final code is as follows:

#define COUNT 5
double decimal[COUNT];
double intAverage;
int integer[COUNT];
int iIndex, intSum;

cout << "Please enter " << COUNT << " positive decimal numbers." << endl;
for (i=0; i<COUNT; i)
{
    cout << i << ": ";
    cin >> decimal[i];
}

for (iIndex=0; iIndex<COUNT; iIndex)
{
    integer[iIndex] = static_cast<int>(decimal[iIndex] +0.5);
}