Exemple

#include <iostream.h>

#define CONST 1.2

int main(int argc, char* argv[]){

cout << "const est << CONST << endl;
return 0;
}

Solution
Utilisez un entier constant ou enum.

#include <iostream.h>

int main(int argc, char* argv[]){

const int CONST = 1.2;

cout << "const est" << CONST << endl;
return 0;
}