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.
// C++ program to use swap function to swap two arrays
// Include necessary header files
#include <algorithm>
#include <iostream>
using namespace std;
int main()
{
// Initialize two arrays a and b
int a[] = { 1, 2, 3, 4 };
int b[] = { 5, 6, 7, 8 };
// Calculate the size of the arrays
int n = sizeof(a) / sizeof(a[0]);
// Swap the contents of arrays a and b
swap(a, b);
// Print the contents of array a after swapping
cout << "a[] = ";
for (int i = 0; i < n; i++)
cout << a[i] << ", ";
// Print the contents of array b after swapping
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,
