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Pass parameters to the constructor of a class that is a member of another class
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Pass parameters to the constructor of a class that is a member of another class
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I have class called Bar, and in this class Bar there is an object of type Foo (a class). Class Bar takes 3 parameters, x, y and z. Foo takes 2 parameters, y and z.
currently I'm doing this:
class Bar {
public:
Bar(int x, int y, int z) {
foo = new Foo(y, z);
do something with x;
}
private:
Foo * foo;
};
I remember seeing in a book another way to do this using a colon but I don't remember how exactly.
What is the standard or usual way of doing something like this?
Use an initializer list and avoid dynamic allocation:
class Bar {
public:
Bar(int x, int y, int z) : foo(y, z) {}
private:
Foo foo;
};
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