Solved

Rounding off values

Posted on 1998-09-21
2
162 Views
Last Modified: 2010-04-01
CString cs;
float Dummy = 48;
Dummy = ((100*Dummy)/322);
cs.Format("Dummy = %f ",Dummy);
m_static1.SetWindowText(cs);

How do I round off the float Dummy to 2 decimal places and loose all evidence of the previous unrounded number.
0
Comment
Question by:rose3377
2 Comments
 
LVL 8

Accepted Solution

by:
Answers2000 earned 50 total points
ID: 1173225
1. TRUE ROUNDING
For sake of clarity on multiple lines (you can pack this into one equation).

Dummy = Dummy * 100 ;
Dummy = floor(Dummy + 0.5 ) ;
Dummy = Dummy / 100 ;

Do this before converting dummy to a string


or

2. ROUNDING FOR DISPLAY

change
cs.Format("Dummy = %f ",Dummy);
to
cs.Format("Dummy = %.2f ",Dummy);

0
 
LVL 2

Expert Comment

by:JYoungman
ID: 1173226
#include <math.h>
double round_two_places(double x)
{
    return ( floor(x*100.0 + 0.5) / 100.0 );
}
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Errors will happen. It is a fact of life for the programmer. How and when errors are detected have a great impact on quality and cost of a product. It is better to detect errors at compile time, when possible and practical. Errors that make their wa…
IntroductionThis article is the second in a three part article series on the Visual Studio 2008 Debugger.  It provides tips in setting and using breakpoints. If not familiar with this debugger, you can find a basic introduction in the EE article loc…
The goal of the tutorial is to teach the user how to use functions in C++. The video will cover how to define functions, how to call functions and how to create functions prototypes. Microsoft Visual C++ 2010 Express will be used as a text editor an…
The viewer will learn how to pass data into a function in C++. This is one step further in using functions. Instead of only printing text onto the console, the function will be able to perform calculations with argumentents given by the user.

920 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

17 Experts available now in Live!

Get 1:1 Help Now