#include<iostream>
using namespace std;
void rev_number(int *number);
int sum_of_digits(int number);
//playing with address
void swap_the_number(int *a,int *b){
int temp=*(a);
*(a)=*(b);
*(b)=temp;
}
//call by value
int sum_of_digits(int number){
int sum=0;
while(number!=0){
int digit=number%10;
sum+=digit;
number/=10;
}
return sum;
}
//main function
int main(void){
int a,b;
cout<<"Enter the value of a : ";
cin>>a;
cout<<"Enter the value of b : ";
cin>>b;
swap_the_number(&a,&b);
cout<<"A = "<<a<<" B = "<<b<<endl;
}