how to pass a vector to a function code example

Example 1: c++ passing vector to function

// Pass by value
void print(std::vector<int> arr) { }

// Pass by reference
void print(std::vector<int>& arr) { }

Example 2: cpp function takes in vector

// Make sure to specify the type of the contents, as in:
void func(vector<int> vect) 
{ 
   vect.push_back(30); 
}