===== #define =====

<code cpp>
#define cpp cout << "C++" << endl;
</code>

#define is used for creating names that will overwrite the current event. 

For example:

<code cpp>

// we are going to make a program that will use a #define for replacing a number

#include <iostream>
#include <cmath>

#define FIVE 5

using namespace std;

int main() {

   cout << "The normal square root of 5 is: " << sqrt(FIVE) << endl;
   cout << "The int square root of 5 is: " << (int)sqrt(FIVE) << endl;
   return 0;
}
</code>