What is the difference ?

[rarian10]

I'm came upon a code but having removing one line changes the whole output of the program. However I couldn't figure out the reason why. In the code below having the "cout<<fixed;" removed cause a different output. Why is that ?

#include <iostream>
#include <iomanip>
using namespace std;

int main ()
{
    double f =3.14159;
    cout << setprecision(5)<<f<<'\n';
    cout << setprecision(9)<<f<<'\n';
    cout << fixed;
    cout << setprecision(5)<<f<<'\n';
    cout << setprecision(9)<<f<<'\n';
}

[salem c]

You mean you came upon this code?
http://www.cplusplus.com/reference/iomanip/setprecision/

Cite your references, not just "I found some code...".

> In the code below having the "cout<<fixed;" removed cause a different output. Why is that ?
Because fixed has a side effect.

You'd get a different output if you removed any other cout statement as well. I'm not sure what you're expecting to see, or what sort of answer you want (short of RTFM).