using namespace std; #include int a,b; void ziopaperone(int *pt,int *ps) { *pt += *ps; *ps -= *pt; } void paperino(int *px,int *py) { *px+=*py; ziopaperone(px,px); *py+=*px; ziopaperone(py,py); } int main () { a=5; b=4; cout << "a= " << a << ", b= " << b << endl; paperino(&a,&b); cout << "a= " << a << ", b= " << b << endl; return 0; }