Set array element via variable

[[Deleted]]

I'm trying to set up an 18 element array of double values where the double values are previously set as variables. However, initializing an array as follows doesn't seem to work:

double Levels[18]={H1, HC1, M1, LC1, L1, O1, C1, P1, H2, HC2, M2, LC2, L2, H3, HC3, M3, LC3, L3};

How do I insert double values as variables into a double array?

[[Deleted]]

Nevermind. I think I got it as follows:

double Levels[18];

Levels[0]=H1; 

Levels[1]=HC1; 

Levels[2]=M1;

Levels[3]=LC1;

Levels[4]=L1;

Levels[5]=O1;

Levels[6]=C1;

Levels[7]=P1;

Levels[8]=H2; 

Levels[9]=HC2; 

Levels[10]=M2;

Levels[11]=LC2;

Levels[12]=L2;

Levels[13]=H3; 

Levels[14]=HC3; 

Levels[15]=M3;

Levels[16]=LC3;

Levels[17]=L3;  

[Simon Gniadkowski]

double Levels[18];

Levels[0] = H1 ; Levels[1] = HC1,  . . . . , Levels[17] = L3

[William Roeder]

double Levels[18]={H1, HC1, M1, LC1, L1, O1, C1, P1, H2, HC2, M2, LC2, L2, H3, HC3, M3, LC3, L3};

This form can only be used with constants. The 18 is optional, if not specified defaults to number of items in the list.