how can I remove a duplicates from sorted array?

Question

what I'm supposed to do is to sort a list of prices and choose one of the values as ordered but there are duplicated prices in the array how can I remove them?

I have like 9 arrays and I need to sort them and print out the value of the order (lowest price, second lowest price, etc..) sorry for not clearing that out.

int lowestPrice(int array[], int size, int order){

int tempArray[size];
    
    for (size_t i = 0; i < size; i++)
        tempArray[i] = array[i];

    for (size_t i = 0; i < size; i++)
        for (size_t j = i; j < size; j++)
            if (tempArray[j] < tempArray[i]) {
                int tmp = tempArray[i];
                tempArray[i] = tempArray[j];
                tempArray[j] = tmp;
            }
    int j = 0;
    for (size_t i = 0; i < size -1; i++){
        if(tempArray[i] != tempArray[i+1])
        {
            tempArray[j] = tempArray[i];
            j++;
        } tempArray[j] = tempArray[i-1];
    }

    return tempArray[order];    
}

Answer 1

You should replace your last "for" with:

int j = 0;
for (size_t i = 1; i < size ; i++){
    if(tempArray[i] != tempArray[i-1])
    {
        tempArray[j] = tempArray[i];
        j++;
    }
}

What you want to do is to keep the first one of each number, so if the current one is equal to the last one, it will ignore it.