Question

Write a C++ function to print any given std::array of a given type to the standard output in the form of {element 0, element 1, element 2, ...}. For example given the double array, d_array = {2.1, 3.4, 5.6, 2.9}, you'd print {2.1, 3.4, 5.6, 2.9} to the output upon executing std::cout << d_array; line of code. Your function mus overload << operator.

Answer 1

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#include<iostream>

#include<array>

template <typename T, size_t N>

std::ostream& operator<<(std::ostream& out, const std::array<T, N>& my_array){

    out<<"{";

    int size = my_array.size();

    for(int i=0; i<size; i++){

        out<<my_array[i];

        if(i!=size-1)

            out<<", ";

    }

    out<<"}";

    return out;

}

int main(){

    std::array<double, 4> d_array = {2.1, 3.4, 5.6, 2.9};

    std::cout<<d_array;

    return 0;

}