remove element from dynamic array c

Cupcake Queen answered on October 28, 2022 Popularity 5/10 Helpfulness 5/10

answer remove element from dynamic array c

remove element from dynamic array c

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int* remove_element(int* array, int sizeOfArray, int indexToRemove)
{
    int* temp = malloc((sizeOfArray - 1) * sizeof(int)); // allocate an array with a size 1 less than the current one

    if (indexToRemove != 0)
        memcpy(temp, array, indexToRemove * sizeof(int)); // copy everything BEFORE the index

    if (indexToRemove != (sizeOfArray - 1))
        memcpy(temp+indexToRemove, array+indexToRemove+1, (sizeOfArray - indexToRemove - 1) * sizeof(int)); // copy everything AFTER the index
          
    free (array);
    return temp;
}

int main()
{
    int howMany = 20;
    int* test = malloc(howMany * sizeof(int));

    for (int i = 0; i < howMany; ++i)
        test[i] = i;

    printf("%d\n", test[16]);
    
    test = remove_element(test, howMany, 16);
    --howMany;
    
    printf("%d\n", test[16]);

    free(test);
    
    return 0;
}

Popularity 5/10 Helpfulness 5/10 Language c

Source: stackoverflow.com

Tags: c dynamic element

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