Question

I am looking for a way to delete an entry from an array in C. Also delete an entry in a structure.

I am pretty new to C, any idea how to do it?

UPDATE:

Found a code that is supposed to delete an entry from a structure:

void removeEntry(student *st, int *nr, char nu[50])
{
    int k=0,i,j;
    for(i=0;i<*nr;i++)
    {
        if(strcmp((st+i)->name,nu)==0)
        {
            k++;
            for(j=i;j<(*nr-k);j++)
            {
                *(st+j)=st[j+1];
            }
        }
    }

    *nr=*nr-k;
}

Answer 1

To delete an entry in a dynamically allocated array (replace T by the actual type stored in the array):

// delete element i in array a of size n
T *delete(T *a, size_t n, size_t i)
{
    memmove(&(a[i]), &(a[i+1]), n - i - 1);
    return realloc(a, sizeof(T) * (n - 1));
}

If order doesn’t matter, then replace the memmove with t[i] = t[n-1];

There’s no way to remove a member from a struct.