int check_sin(int *sin_array) {
    int sin_total = 0;
    for(int i = 8; i>=0; i--){
        if(i % 2 == 0){
            sin_total += sin_array[i];
        }
        else{
            if(sin_array[i] < 5){
                sin_total += (sin_array[i] * 2);
            }
            else{
                int temp1 = sin_array[i] % 2;
                int temp2 = sin_array[i] / 10;
                int add = temp1 + temp2;
                sin_total += add;
                // int temp = sin_array[i];
                // while(temp != 0){
                //     sin_total += (temp % 10);
                //     temp = temp / 10;
                }
            }
        }
        if((sin_total % 10) != 0){
            return 1;
        }
    return 0;
    }
if int i is even, add sin_array[I] to sin_total
if int i is ODD, add the digits of sin_array at the ith position to sin_total