#include <stdio.h>
#include <stdlib.h>

void zmena (int x,int y)
{
    int a=0,b=0,pom=0;
    pom = a;
    a = b;
    b = pom;

    printf("%d %d",a,b);
}
main()
{
    int x=0,y=0;
    printf("Zadaj prve cislo\n");
    scanf("\n%d",&x);

    printf("Zadaj druhe cislo\n");
    scanf("\n%d",&y);

    zmena(x,y);

}