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Delete array element in given index range [L – R] in C++ Program
In this tutorial, we are going to learn how to delete elements from the given range. Let's see the steps to solve the problem.
Initialize the array and range to delete the elements from.
Initialize a new index variable.
Iterate over the array.
If the current index is not in the given range, then update the element in the array with a new index variable
Increment the new index.
Return the new index.
Example
Let's see the code.
#include <bits/stdc++.h>
using namespace std;
int deleteElementsInRange(int arr[], int n, int l, int r) {
int i, newIndex = 0;
for (i = 0; i < n; i++) {
// adding updating element if it is not in the given range
if (i <= l || i >= r) {
arr[newIndex] = arr[i];
newIndex++;
}
}
// returing the updated index
return newIndex;
}
int main() {
int n = 9, l = 1, r = 6;
int arr[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
int updatedArrayLength = deleteElementsInRange(arr, n, l, r);
for (int i = 0; i < updatedArrayLength; i++) {
cout << arr[i] << " ";
}
cout << endl;
return 0;
}Output
If you execute the above program, then you will get the following result.
1 2 7 8 9
Conclusion
If you have any queries in the tutorial, mention them in the comment section.
Updated on: 27-Jan-2021
20K+ Views
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