Error: invalid types 'double[double]' for ar

Bonjour,

J'ai un message d'erreur lorsque je compile:
"error: invalid types 'double[double]' for array subscript"

Voici mon code:

void test()
{

double nbcol=6;
double nbrow=6;

double x_x=6.66;
double y_y=6.66;

double inter_line=0.3;
double inter_x = (inter_line+x_x)*nbcol;

for(double col=0.;col<nbcol;col++)
{
inter_x[col] = inter_x+inter_line;
}
}