Thread: How Do I Cout A Double Or Float

  1. #1
    Registered User
    Join Date
    Mar 2002
    Posts
    2

    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
    Join Date
    Feb 2002
    Posts
    160
    #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

  3. #3
    Registered User
    Join Date
    Mar 2002
    Posts
    2
    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
    Unregistered
    Guest
    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
    Join Date
    Jan 2002
    Location
    Northern Virginia/Washington DC Metropolitan Area
    Posts
    3,817
    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

Popular pages Recent additions subscribe to a feed

Similar Threads

  1. Replies: 2
    Last Post: 05-13-2009, 03:25 PM
  2. C++ to C Conversion
    By dicon in forum C Programming
    Replies: 7
    Last Post: 06-11-2007, 08:38 PM
  3. Debug Error Really Quick Question
    By GCNDoug in forum C Programming
    Replies: 1
    Last Post: 04-23-2007, 12:05 PM
  4. Configurations give different results
    By Hubas in forum Windows Programming
    Replies: 2
    Last Post: 04-11-2003, 11:43 AM
  5. error declaration terminated incorrectly help
    By belfour in forum C++ Programming
    Replies: 7
    Last Post: 11-25-2002, 09:07 PM