Beginner's question

[efulton1]

This is probably the dumbest question ever, but I just started using C++ today. When I try to multiply two constants of type "double" I get an error: "Illegal use of floating point in function..." How do you do this correctly? Here is basically what I have going on:

const double deltax = 1E-9;
const double deltat = 2E-15;
const double alpha = 1.27E-4;
double Fo;

Fo = alpha*deltax/deltat^2;

Thanks.

 

[jtm111]

There is no such thing as deltat^2 in C++.

To raise to the power of 2, use

pow(deltat, 2)

Also be sure to include <cmath>

 

[Pavlo]

Greetinx!

or deltat*deltat. Happy programming!))