4 easy question

This is a discussion on 4 easy question within the C++ Programming forums, part of the General Programming Boards category; 1# I am using a double. When I cout out my data I want there to be two digits after ...

  1. #1
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    4 easy question

    1# I am using a double. When I cout out my data I want there to be two digits after the period. How do I do this? Example 2+3 = 5.00 instead of 5.

    2# When I use tabs (the ones on your keyboards) it works like regular tabs (as it would in MS word, or notepad). When you hit tab it moves the cursor to a certain location and everything you type is added and it expends to the right. How do I make it to expand to the left? (for example, tell ms word to align everything to the right, when you add text, its pushed to the left to make room.) I need this info simple to make my program look better.

    3# What is the best and easy way to erase the whole screen (so I can output the data to a clean screen).

    4# I am trying to calculate balance in a savings account... But the problem is the formulate is
    AmountInSavings = Principle * ((1 + (InterestRate/TimesCompounded)) ^ TimesCompounded)

    The problem there is the fact that you can not scare root double numbers (and InterestedRate is a fraction).

  2. #2
    Registered User Bajanine's Avatar
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    To your first question look up 'setprecision'.
    Use 'std::fill' for your second.
    Look in the FAQ
    I didn't know doubles could be scared!
    "A government big enough to give you everything you want, is big enough to take away everything you have." - Thomas Jefferson
    MSVS 2008 Pro / DevPartner / CB NightlyBuilds / MinGW / Cygwin

  3. #3
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    1)

    Code:
    #include <iomanip>
    ...
    ...
    cout<<fixed<<setprecison(2)<<your_var;
    2) and 3) See here:

    http://www.adrianxw.dk/SoftwareSite/...Consoles1.html

    If you want to keep 3) simple, you can do this:
    Code:
    for(int i=0; i<100; i++) 
        cout<<endl;
    4) Huh?

    double pow( double base, double exp );
    Last edited by 7stud; 10-15-2005 at 10:55 PM.

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