#include <stdio.h>
void switcheroo(double *x, double *y);
int main()
{
    double a = 67.8889939993;
    double b = 40.747474788292;
    printf("before switch %d, %d\n", a, b);
    switcheroo(&a, &b);
    printf("this is value switched %d, %d\n", a, b);

}
void switcheroo(double *a, double *b)
{
    double temp;
    temp = *a;
    *a = *b;
    *b = temp;
}