C++ variable length Array? - Answered

Question

Is there a way of making an array with a variable length?
here is my attempt:

class T
{
public:
T(float c);
float a[b];
};
int main() {
T a = new T(5);
return 0;
}
// why does this not work?
T::T(float c)
:b(c)
{;}

https://code.sololearn.com/ciO17r85TYE7/?ref=app

Answer 1

I believe the size of classes/objects has to be known at compile time and so b can't be variable.

The ways to make variable-length arrays are
- using the `new` keyword: `new float[b];`
- using std::vector (recommended)

Answer 2

Put "return 0" in the end of the function

Answer 3

"return 0" is added automaticly and is not needed.