/*
	http://www.ProbCOMP.com
	
	In C and C++, parameters to a function are passed by value. 
	This makes a copy of the variable and can be quite slow and inefficient if the variable is large like an array. 


*/

#include<stdio.h>

void swap(int a,int b)
{
	int tmp;
	tmp=a;
	a=b;
	b=tmp;
	printf("a=%d and b=%d",a,b);

}

void main()
{
	int a=10,b=20;
	swap(a,b);
}