Are vectors passed to functions by value or by reference in C++

Question

I\'m coding in C++. If I have some function void foo(vector test) and I call it in my program, will the vector be passed by value or reference? I\'m

Answer 1

void foo(vector test)

vector would be passed by value in this.

You have more ways to pass vectors depending on the context:-

1) Pass by reference:- This will let function foo change your contents of the vector. More efficient than pass by value as copying of vector is avoided.

2) Pass by const-reference:- This is efficient as well as reliable when you don't want function to change the contents of the vector.