Given two arrays a[] and b[] of same size, we need to swap their contents.
Example :
Input : a[] = {1, 2, 3, 4} b[] = {5, 6, 7, 8} Output : a[] = {5, 6, 7, 8} b[] = {1, 2, 3, 4}
A simple solution is to iterate over elements of both arrays and swap them one by one.
A quick solution is to use std::swap(). It can directly swap arrays if they are of same size.
// Illustrating the use of swap function // to swap two arrays #include <iostream> #include <utility> using namespace std;
// Driver Program int main ()
{ int a[] = {1, 2, 3, 4};
int b[] = {5, 6, 7, 8};
int n = sizeof (a)/ sizeof (a[0]);
swap(a, b);
cout << "a[] = " ;
for ( int i=0; i<n; i++)
cout << a[i] << ", " ;
cout << "\nb[] = " ;
for ( int i=0; i<n; i++)
cout << b[i] << ", " ;
return 0;
} |
Output :
a[] = 5, 6, 7, 8, b[] = 1, 2, 3, 4,
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