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Richie Weber
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Asked: 2022-06-30T09:47:46+00:00 In:

How to pass array by reference c++?

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Hello experts. I am a newbie in this field and I would love to know how to pass array by reference c++. Please help me. I look forward to the answer. Thanks in advance for everyone’s help.

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1 Answer

  1. Best Answer
    Expert

    Hi, glad to help you.
    Here’s how to do it:

    In C++, you can send an array by reference by adding the ampersand character (&) before the name of the relevant function argument. Other built-in kinds and composite data structures typically use the same notation.

    The std::vector container of STL will be our primary focus in the parts that follow. The contiguous dynamic array is implemented by this container, and it offers a number of member functions to control its contents.

    Program:

    #include <iostream>
#include <vector>
using std::cout;
using std::endl;
void printVectorContents(std::vector<int>& v)
{
for (const auto& item : v) {
cout << item << “, “;
}
cout << “n”;
}
const size_t ELEMS = 10;
int main() {
std::vector<int> vec1;
srand(1);
for (size_t i = 0; i < ELEMS; i++) {
vec1.push_back(rand());
}
cout << “Initialized vector of ” << vec1.size() << ” elements .. ” << endl;
printVectorContents(vec1);
return 0;
}

    Output:

    Initialized vector of 10 elements.

1804289383, 846930886, 1681692777, 1714636915, 1957747793, 424238335, 719885386, 1649760492, 596516649, 1189641421,
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