如何编写构造函数 function 来设置向量的大小，该向量是 C++ 中的 class 的属性？

Question

The attribute of my class is a vector whose size represents the number of dimensions of a vector. I have to write a constructor that makes a null vector for a given size. I'm not sure how to do it, this is what I've tried:

Vecteur(size_t d)
    : coord.size(d) { for( auto c : coord){ c = 0;}}

This is the error I get:

Answer 1

Your can't initialize a member of your class member in using initializer list but you can only use constructors.

So your declare a constructor for your vector which initializes its member to zero then use this constructor in your class initializer list