Reorder Array acc to given index
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#include<iostream>
using namespace std;
// Function to reorder elements of arr[] according
// to index[]
void reorder(int arr[], int index[], int n)
{
int temp[n];
// arr[i] should be present at index[i] index
for (int i=0; i<n; i++)
temp[index[i]] = arr[i];
// Copy temp[] to arr[]
for (int i=0; i<n; i++)
{
arr[i] = temp[i];
index[i] = i;
}
}
// Driver program
int main()
{
int arr[] = {50, 40, 70, 60, 90};
int index[] = {3, 0, 4, 1, 2};
int n = sizeof(arr)/sizeof(arr[0]);
reorder(arr, index, n);
cout << "Reordered array is: \n";
for (int i=0; i<n; i++)
cout << arr[i] << " ";
cout << "\nModified Index array is: \n";
for (int i=0; i<n; i++)
cout << index[i] << " ";
return 0;
}
Cpp
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