Why Does My Array Always Have 2 Members?

Question

For some reason, even though the code creates a flexible array with 6 members, when I pass it as a parameter to the BAW Plot constructor, the this->contents always has 2 members.
Why does this happen? How can I fix this? Can someone point me to an article about arrays as parameters in-depth?

https://code.sololearn.com/c2Wiok5P0xOF/?ref=app

Answer 1

Using sizeof to find the array size within a function/class wherein the array is passed as a parameter, is error prone. The array decays to a pointer, and sizeof would return the pointer size.

https://stackoverflow.com/questions/17590226/finding-length-of-array-inside-a-function

Also, why do you call it a 'flexible array'? It's clearly a fixed size one. Try using std::vector in <vector>, which knows it's own size.

std::vector obj = {1,2,3,4,5,6};
std::cout << obj.size();