Answers for "define in c++ example"

how to declare a function in c++

// function example
#include <iostream>
using namespace std;

int addition (int a, int b)
{
  int r;
  r=a+b;
  return r;
}

define c++

#define SPEED ios::sync_with_stdio(false); cin.tie(0); cout.tie(0)
#define ar array
#define ll long long
#define pb push_back