int i;      /* Loop control variable */
    int n;      /* The number of elements being stored in the loop */
    int x[20];  /* The array 'x' with 20 element */
    int y[20];  /* The array 'y' with 20 element */
    int tempx;  /* Temp value for x */
    int tempy;  /* Temp value for y */

    double sum_z,       /* The sum of the value */
           cal_z,       /* The calculated value of 'z' after the sqrt(sum_z) */
           sentinel,    /* Sentinel value (-999) */
           z[20];       /* The array 'z' with the 20 elements */

    i = 0;  /* Initialising the value of 'i' */
    sum_z = 0;  /* Initialising the value of 'sum_z' */
    sentinel = (-999);  /* Stating that value of the sentinel */