Decimals not displaying when using Float or Double type

Question

My code is this:

#include <iostream>

int main()
{
    using namespace std;

    const float dollar = 1.00;

    cout << "You have " << dollar*10.00 << " dollars." << endl;

    cin.get();
    cin.get();

    return 0;
}

I am a beginner to C++. I typed this code just playing around and assumed that the console would display "You have 10.00 dollars, but it actually displays that I have "10" and not "10.00" dollars. Why is this?

Answer 1

Since you are dealing with dollar amounts, you can set the following before writing to cout:

std::cout.precision(2);
std::cout.setf(std::ios::fixed);

Live code example at coliru

#include <iostream>

int main() {
    using namespace std;
    const float dollar = 1.00;
    std::cout.precision(2);
    std::cout.setf(std::ios::fixed);
    cout << "You have " << dollar*10.00 << " dollars." << endl;
    cin.get();
    cin.get();
    return 0;
}