#include <iostream>

unsigned int tara[1024][3];
unsigned int data[1024][4];

struct storage {
     unsigned int (*data)[4];
     unsigned int (*tara)[3];
 };

int taraButtonCallback(void* but_data);

int main ()
{
 void* dummy ;
 struct storage but_data;
 but_data.data = data;
 but_data.tara = tara;
   
 taraButtonCallback ( (void *)&but_data);
}

int taraButtonCallback(void* but_data)
{
    struct storage* data = ( struct storage*)but_data;
    int max = -5;
    int max_value = 0;
    int val = data->data[0][0];
     cout <<val ;  //!!ERROR!!
    return 0;
}

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