#define in cpp

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

#define in cpp

// The #define preprocessor directive creates symbolic constants
#include <iostream>
using namespace std;

#define CONSTANT 2.71828

int main () {
   cout << "Declared constant: " << CONSTANT << endl; 

   return 0;
}

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