CPP

constant variable in c++ example

#include <iostream>
using namespace std;
 
// Driver Code
int main()
{
 
    // const int x;  CTE error
    // x = 9;   CTE error
    const int y = 10;
    cout << y;
 
    return 0;
}

constants in cpp

#define identifier value

c++ define constant

#include <iostream>
using namespace std;

#define PI 3.14159
#define NEWLINE '
'

int main ()
{
  double r=5.0;               // radius
  double circle;

  circle = 2 * PI * r;
  cout << circle;
  cout << NEWLINE;

}
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