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  1. #include <stdio.h>
  2.  
  3. // Function to remove a given number of elements from an array
  4. void removeElements(int arr[], int *size, int position, int count) {
  5.     // Validate position and count
  6.     if (position < 0 || position >= *size || count < 0) {
  7.         printf("Invalid position or count for removal.\n");
  8.         return;
  9.     }
  10.  
  11.     // Adjust count if it exceeds the remaining elements
  12.     if (position + count > *size) {
  13.         count = *size - position;
  14.     }
  15.  
  16.     // Shift elements to the left to overwrite the removed elements
  17.     for (int i = position; i < *size - count; i++) {
  18.         arr[i] = arr[i + count];
  19.     }
  20.  
  21.     // Update the size of the array
  22.     *size -= count;
  23. }
  24.  
  25. void printArray(int arr[], int size) {
  26.     printf("Array: [ ");
  27.     for (int i = 0; i < size; i++) {
  28.         printf("%d ", arr[i]);
  29.     }
  30.     printf("]\n");
  31. }
  32.  
  33. int main() {
  34.     int arr[] = {10, 20, 30, 40, 50, 60, 70, 80};
  35.     int size = sizeof(arr) / sizeof(arr[0]);
  36.  
  37.     printf("Original ");
  38.     printArray(arr, size);
  39.  
  40.     int position_to_remove = 2; // Index from where to start removing
  41.     int number_of_elements_to_remove = 3; // Number of elements to remove
  42.  
  43.     removeElements(arr, &size, position_to_remove, number_of_elements_to_remove);
  44.  
  45.     printf("After removing %d elements from position %d: ", number_of_elements_to_remove, position_to_remove);
  46.     printArray(arr, size);
  47.  
  48.     // Example 2: Removing from the end
  49.     int arr2[] = {1, 2, 3, 4, 5};
  50.     int size2 = sizeof(arr2) / sizeof(arr2[0]);
  51.  
  52.     printf("\nOriginal ");
  53.     printArray(arr2, size2);
  54.  
  55.     removeElements(arr2, &size2, 3, 2); // Remove 2 elements from index 3 (elements 4 and 5)
  56.  
  57.     printf("After removing 2 elements from position 3: ");
  58.     printArray(arr2, size2);
  59.  
  60.     return 0;
  61. }
  62.  
Success #stdin #stdout 0.01s 5284KB
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stdin 
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stdout 
Original Array: [ 10 20 30 40 50 60 70 80 ]
After removing 3 elements from position 2: Array: [ 10 20 60 70 80 ]

Original Array: [ 1 2 3 4 5 ]
After removing 2 elements from position 3: Array: [ 1 2 3 ]
https://ideone.com/lk1pHF
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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