#include<iostream>
using namespace std;
int main()
{
//variable declaration
int arr[100], i, temp, size;
cout << "enter array size : ";
cin >> size;
cout << "enter elements in to array : \n";
for (i = 0; i < size; ++i)
{
cin >> arr[i];
}
cout << "\narray before swaping elements : \n";
for (i = 0; i < size; ++i)
{
cout << arr[i] << " ";
}
//element swapping logic
for (i = 1; i < size; i += 2)
{
temp = arr[i];
arr[i] = arr[i - 1];
arr[i - 1] = temp;
}
cout << "\narray after swapping elements : \n";
for (i = 0; i < size; ++i)
{
cout << arr[i] << " ";
}
return 0;
}
_______________________________OUPUT______________________________
enter array size : 4
enter elements in to array :
1 2 3 4
array before swaping elements :
1 2 3 4
array after swapping elements :
2 1 4 3
