Pointeri cu structuri

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

/*

 *
 */

typedef struct{
    int aa;
}NrComplex;

typedef struct{
    int primul_termen,y;
}NrComplex2;

#define TAB_SIZE 120
#define TAB_SIZE2 1000
void lucru_cu_tabel(NrComplex *ptr, int n){
    //printf("Nr octeti: %d\n", sizeof(ptr));
    for(int i=0;i<n;i++)
        scanf("%d", &ptr[i].aa);
}

int main() {
    int i;
    int tab[TAB_SIZE];
    int * ptrtab = (int*)malloc(sizeof(int) * TAB_SIZE2);
    printf("sizeof(tab): %d\n", sizeof(tab));
//    lucru_cu_tabel(ptrtab, 3);
//    printf("i= %d\n", i);

    NrComplex a2;
    NrComplex2 *a3 = (NrComplex2*)malloc(sizeof(NrComplex2)*10);
    (*a3).primul_termen;
    a3->primul_termen; // a3[0].primul_termen
    a3[2].primul_termen;



    return 0;
}