Question about exponents

This is a discussion on Question about exponents within the C++ Programming forums, part of the General Programming Boards category; Here's the code Code: #include <iostream> using namespace std; main(){ int x; x = 5 * 45e-6; cout<< x; } ...

  1. #1
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    Question about exponents

    Here's the code

    Code:
    #include <iostream>
    
    using namespace std;
    
    main(){
    int x;
    x = 5 * 45e-6;
    cout<< x;
    
    }

    I need to get an answer with an exponent in it like for example the answer in the program is 0.000225 but i need an answer like this 2.25e-4 how can i do that?... any idea guys.? tnx in advance...

  2. #2
    C++ Witch laserlight's Avatar
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    Before anything else, main() returns an int, so declare it as returning an int. Then. x is an int, but you want it to be a double.

    I need to get an answer with an exponent in it like for example the answer in the program is 0.000225 but i need an answer like this 2.25e-4 how can i do that?
    Before printing x, set:
    Code:
    cout.setf(ios::scientific);
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  3. #3
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    or you could do

    Code:
    cout << scientific << x << endl;
    btw, using an int for these calculations is useless

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    weeeiiuuhh tnx for the help laserlight and KIBO i really appreciate it...

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