Cant access arrey inside the function c++

[Max_a]

The thing is, i need to create threads and using them sort an arrey.
Tried in 1 thread. I am using struct to put there limits of an arrey. I can use them. But every time i try to use that arrey - i'm getting an error. Firstly, i tried to put pointer on massive inside the struct. Made it global, but did not help. Can any1 pls help? Here is the code:
@
//My struct
struct t_arg
{
int begin;
int end;
QTextBrowser *tb;
};

//My function
void * sort(void* arg)
{
struct t_arg tmp_arg = *(struct t_arg *) arg;

int begin = tmp_arg.begin; int end = tmp_arg.end;

for(int j = begin; j < end; j++)

    for(int i = begin; i < end-1; i++)

    {
        if(mass[i] > mass[i+1]) //Getting error here, if i  comment it - get error below.

        {

            int tmp = mass[i]; mass[i] = mass[i+1];// here(

            mass[i+1] = tmp;

        }
    }
return NULL;

}

//main part
pthread_t thread; struct t_arg tmp_struct;

n_qthreads = ui->comboBox->currentText().toInt(); n_e_quantity = ui->spinBox->value();

mass = new int[n_e_quantity];

for(int i = 0; i < n_e_quantity; i++)

{
    mass[i] = rand()0 + 40;
}

tmp_struct.begin = 0;

tmp_struct.end = n_e_quantity;

tmp_struct.tb = ui->textBrowser;


pthread_create(&thread, NULL, &sort, &tmp_struct);

@

[Added @ around code. andreyc]

[andreyc]

Welcome to Qt DevNet,

1. You can not use UI elements in the threads.
2. You passing an address of local variable tmp_struct to pthread_create(). At the time when the thread is started this variable is gone and you are accessing invalid pointer. Allocate tmp_struct using new before sending it to pthread_create. Don't forget to release it in the sort function.