Question

C++ problem:

Write a function that:

• accepts two integer variable arguments by reference
• swaps the contents of the two variables
• does not return anything
• does not interact with the user in anyway

Answer 1

#include<iostream>

using namespace std;

void swap(int& a, int& b){
   int tmp = a;
   a = b;
   b = tmp;
}

int main() {
   int a,b;
   a=5;
   b=7;
   swap(a,b);
   cout<<"a: "<<a<<endl;
   cout<<"b: "<<b<<endl;
   return 0;
}

void swap(int& a, int& b){
   int tmp = a;
   a = b;
   b = tmp;
}