default, fixed and scientific float output

Bjarne Stroustrup “Programming Principles and Practice Using C++”
Chapter 11 Drill 9
Using std_lib_facilities.h by Bjarne Stroustrup.

//	Philipp Siedler
//	Bjarne Stroustrup's PPP
//	Chapter 11 Drill 9

#include "std_lib_facilities.h"

void print_num(double _num) {
	int width = 12;
	cout << setw(width) << "defaultfloat\t" << defaultfloat << _num << endl;
	cout << setw(width) << "fixed\t" << fixed <<_num << endl;
	cout << setw(width) << "scientific\t" << scientific << _num << endl;
}

int main()
try
{
	double num = 1234567.89;

	print_num(num);

	keep_window_open();
}
catch (runtime_error e) {
	cout << e.what() << endl;
	keep_window_open();
}
catch (...) {
	cout << "Exiting" << endl;
	keep_window_open();
}
Output:
1234567.89
defaultfloat    1.23457e+06
fixed     1234567.890000
scientific     1.234568e+06
Please enter a character to exit

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.