Question

How to square all elements of array in C++

Answer 1

#include <iostream>  
#include <iterator>
#include <algorithm>

using std::cout;
using std::endl;


void print(int arr[], int size)
{
	copy(arr, arr + size, std::ostream_iterator<int>(cout, " "));

	cout << endl;
}

int main()
{
	int arr[] = { 1, 2, 3, 4, 5 };

	int size = sizeof(arr) / sizeof(int);

	std::transform(arr, arr + size, arr, arr, std::multiplies<int>());

	print(arr, size);

	return 0;
}


/*
run:

1 4 9 16 25

*/

 

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