#include <stdio.h> #include "funcs.h" void doubler(int a, int *b) { a = a + a; *b = *b + *b; printf("In doubler() a = %d, *b = %d\n", a, *b); } void call_by() { int a = 10; int b = 20; doubler(a, &b); printf("In call_by() a = %d, b = %d\n", a, b); }