How Do I Cout A Double Or Float

This is a discussion on How Do I Cout A Double Or Float within the C++ Programming forums, part of the General Programming Boards category; How can I use the COUT to display DOUBLE or FLOAT values? Thanks Paul...

  1. #1
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    How Do I Cout A Double Or Float

    How can I use the COUT to display DOUBLE or FLOAT values?

    Thanks

    Paul


  2. #2
    Registered User Paro's Avatar
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    #include <iostream.h>

    int main()
    {
    double num = 3.14;
    float num2 = 3.201;

    cout<<num<<" "<<num2<<endl;
    return 0;
    }
    thats a simple way to do it, you just do it like any other variable
    Paro

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    Is there a way to change the display so that I only see 3.1 or 3.2 from your example??

    Thanks again.

    Paul

  4. #4
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    look up setprecision() and other stream modifiers in your compilers online help section or the stream section of your favorite textbook/tutorial.

  5. #5
    Registered User hk_mp5kpdw's Avatar
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    Two ways, either:

    Code:
    #include <iostream>
    #include <iomanip>
    using namespace std;
    
        ...
    
        cout << setiosflags( ios::fixed ) << setprecision( 1 )
             << num << ' ' << num2 << endl;
    Or:

    Code:
    #include <iostream>
    using namespace std;
    
        ...
    
        cout.setf( ios::fixed );
        cout.precision( 1 );
        cout << num << ' ' << num2 << endl;
    "Owners of dogs will have noticed that, if you provide them with food and water and shelter and affection, they will think you are god. Whereas owners of cats are compelled to realize that, if you provide them with food and water and shelter and affection, they draw the conclusion that they are gods."
    -Christopher Hitchens

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