#include <stdio.h> /* Call by value */ void swapByValue(int a, int b) { int temp; temp = a; a = b; b = temp; printf("Inside swapByValue: a=%d, b=%dn", a, b); } /* Call by reference */ void swapByReference(int *a, int *b) { int temp; temp = *a; *a = *b; *b = temp; printf("Inside swapByReference: a=%d, b=%dn", *a, *b); } int main() { int x = 10, y = 20; printf("Before swap:n"); printf("x=%d, y=%dnn", x, y); swapByValue(x, y); printf("nAfter swapByValue (in main):n"); printf("x=%d, y=%dnn", x, y); swapByReference(&x, &y); printf("nAfter swapByReference (in main):n"); printf("x=%d, y=%dn", x, y); return 0; }