Installation and Configuration
Programming Methodology

Remove a Specific Element from an Array in C++

In this exercise, you will develop a program that removes a specific element from an array. Removing elements from an array is a common task, especially when working with data that may need modification or updating.

The goal is to identify a specific element within the array, remove it, and shift the remaining elements to fill the gap. This exercise will help you practice working with arrays, loops, and element manipulation in C++.

Group

Arrays and Vectors in C++

Objective

1. Define an array with several integer values.
2. Specify the element to be removed.
3. Loop through the array and search for the element.
4. Once the element is found, shift all the subsequent elements one position to the left to fill the gap.
5. After the shift, decrease the size of the array (or adjust the index accordingly).
6. Test the program by removing different elements from the array.

Develop a program that removes a specific element from an array.

Example C++ Exercise

 Copy C++ Code 
#include <iostream> // Include iostream for input and output
using namespace std; // Use the standard namespace

// Function to remove a specific element from the array
void removeElement(int arr[], int& size, int element) {
    bool found = false; // Flag to check if the element is found
    
    // Loop through the array to find the element
    for (int i = 0; i < size; i++) {
        if (arr[i] == element) { // If the element is found
            found = true; // Set the flag to true
            // Shift all the subsequent elements one position to the left
            for (int j = i; j < size - 1; j++) {
                arr[j] = arr[j + 1]; // Move each element to the left
            }
            size--; // Decrease the size of the array
            break; // Exit the loop after removing the element
        }
    }
    
    if (!found) { // If the element was not found
        cout << "Element not found in the array." << endl;
    }
}

// Function to print the array
void printArray(int arr[], int size) {
    for (int i = 0; i < size; i++) {
        cout << arr[i] << " "; // Print each element of the array
    }
    cout << endl; // Print a newline at the end
}

int main() {
    // Define an array of numbers
    int numbers[] = {10, 20, 30, 40, 50};
    int size = sizeof(numbers) / sizeof(numbers[0]); // Calculate the size of the array
    int elementToRemove = 30; // Element to remove

    cout << "Original array: ";
    printArray(numbers, size); // Print the original array

    // Call the function to remove the element
    removeElement(numbers, size, elementToRemove);

    cout << "Array after removal: ";
    printArray(numbers, size); // Print the array after removal

    return 0; // End of program
}

 Output

Original array: 10 20 30 40 50 
Array after removal: 10 20 40 50

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