I need scanf_s identifier

#include <stdio.h>

void get_sum_diff(int x, int y, int* p_sum, int* p_diff);

int main(void)
{
    int x;
    int y;
    int r, s;

    printf("Enter an integer");
    scanf_s("%d %d", &x, &y); 

    void get_sum_diff(x, y, &r, &s);

    printf("sum of elements = %d", r);
    printf ("the difference between elements = %d", s);

    return 0;
}

void get_sum_diff(int x, int y, int* p_sum, int* p_diff)
{
    *p_sum = x + y;
    *p_diff = x - y;
}