#include <iostream>

using namespace std;

int main()
{
    double x = 7;
    bool result = x == 6.9999999999999999;
    cout << "x == 6.9999999999999999 : " << (result ? "true" : "false") << endl;
    return 0;
}

// result:
// x == 6.9999999999999999 : true