change color with a gesture 1D

[VenAle17]

Hi all,
i have this situation:

void Luce::gesture(int result)
{

    int valore[1000]= {0};
    for (int i = 0;i< 1001;i++) {
      valore[i] = result;
    }

     int primo = valore[0];
     int ultimo = valore[999];
     qDebug()<< primo << ultimo << endl;
     if (primo != ultimo)
     {
       on_pushButton_released();
     }

     else {
         return;
     }
}

I create this program that receives data (result) from a serial port.
i want to create this gesture:
if result is a decreasing data (so 'primo', the first value, is higher than 'ultimo', the last data of my array) my led has to change color. It should appears like a hand that get close and closer to the range sensor.
I wrote this and compiled, but the program close forcefully and crashed.
Any idea of why and how can i resolve it?
Thanks to everybody.

[VenAle17]

i worked on it and i change the code:

int valore[100]= {0};
int prev = 0 ;
int next= 0 ;

for (int i = 0;i< 100;i++)
    {
        if(i == 0)
            {
                next= prev;
                valore[i] = 0;
               //qDebug()<< "this is  if"<<endl;
            }
        else {
            valore[i] = result;  
            prev = valore[i-1];
            next = valore[i];             // qDebug()<< " this is else"<<endl;

                if( prev > next)
                {
                    qDebug()<<"this is my if 2"<<endl;
                    on_pushButton_released();
                }
        }
    }