C++ problem on output

Question

anyone knows to show exactly numbers like this: -550.987654321234 I'm using float or double it shows -550.988 and that's not the output I want. Anyone knows to solve this?

Answer 1

using namespace std;

//THESE HEADERS ARE REQUIRED !!!!!

#include <iostream>

#include <iomanip>

int main()

{

double flAmt = -550.987654321234;

//16 digits of precision

cout << fixed << setprecision(16) << flAmt << endl;

}