Thread: Assigning an array with a variable number of elements

Hi.
I am new on this forum.
I have a simple problem about memory allocation.
In the function Nr_elements() i assign a value which represent the elements of array. The pointer p is initialised with the address of variable n, but when i compile i dont know why but dont work.
This function return a pointer.
Can somebody help me ?
Thank you.

Code:

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


int *Nr_elements();
int *allocate(int);
void deallocate(int *);


int main()
{
    int i, *tab, *tab1;
    tab = Nr_elements();
    tab1 = allocate(*tab);
    printf("\n The elements of array : ");
    for(i=0; i<*tab; i++)
        printf(" %d", *(tab1+i));
    printf("\n");
    deallocate(tab1);
    return 0;
}


int *Nr_elements()
{
    int *p, n;
    p = &n;
    printf("\n Enter the number of elements : ");
    scanf("%d", &n);
    return p;
}


int *allocate(int n)
{
    int i, *ptr;
    ptr = (int *)malloc(n * sizeof(int));
    for(i=0; i<n; i++)
    {
        printf("\n Ptr[%d] = ", i+1);
        scanf("%d", ptr+i);
    }
    return ptr;
}


void deallocate(int *ptr)
{
    free(ptr);
}

Thank you for your interest.
I have done the modification that you suggest me.

Know i want to make a function that print me the elements of array.
Look how i did it.

Code:

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


int Nr_elemente();
int *aloca(int);
void afiseaza(int, int *);
void dealoca(int *);


int main()
{
    int i, tab, *tab1;
    tab = Nr_elemente();
    tab1 = aloca(tab);
    printf("\n The elements of array : ");
    afiseaza(tab, tab1);
    dealoca(tab1);
    return 0;
}


int Nr_elemente()
{
    int n;
    printf("\n Enter the number of elements : ");
    scanf("%d", &n);
    return n;
}


int *aloca(int n)
{
    int i, *ptr;
    ptr = (int *)malloc(n * sizeof(int));
    for(i=0; i<n; i++)
    {
        printf("\n Ptr[%d] = ", i+1);
        scanf("%d", ptr+i);
    }
    return ptr;
}


void afiseaza(int n, int *ptr)
{
    int i;
    for(i=0; i<n; i++)
        printf(" %d", *(ptr+i));
    printf("\n");
}


void dealoca(int *ptr)
{
    free(ptr);
}