#include <stdio.h>
int x = 10, y = 20;
// NON FUNZIONA!
void scambia(int a, int b) {
int temp = a;
a = b;
b = temp;
}
void scambiap(int* a, int *b) {
int temp = *a;
*a = *b;
*b = temp;
}
int main() {
printf("%d %d\n",x,y);
scambia(x,y);
printf("%d %d\n",x,y);
scambiap(&x,&y);
printf("%d %d\n",x,y);
}
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