Display number with decimal places instead of whole number

Question

I have this

double a = 4.0;
double b = 2.0;
double g = a + b;

std::cout << g;

I am getting 6, but I want to get 6.0

Answer 1

If you always want one figure after the decimal point regardless of how many digits the answer is, use std::fixed along with std::setprecision

#include 

std::cout << std::fixed << std::setprecision(1) << g;