How do i make output answers into fractions?

Code:

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#include <iostream>
#include <cmath>

using namespace std;

int main (double x1 , double y1 , double x2 , double y2)
{
    double midpointx;
    double midpointy;
    cout << "First Coordinate.\n" << endl << "Enter x " << endl;
    cin >> x1;
    cout << "Enter y " << endl;
    cin >> y1;
    cout << "Second Coordinate.\n" << endl << "Enter x " << endl;
    cin >> x2;
    cout << "Enter y " << endl;
    cin >> y2;

    midpointx = (x1 + x2)/2;
    midpointy = (y1 + y2)/2;

    cout << "The midpoint of your two coordinates is: ( " << (midpointx) << " , " << (midpointy) << " ). " << endl;
    cin.get();
    return 0;
}

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i made this basic program and i tested it and it works but i have a problem. If the answer is in a decimal such as doing the equation (5 divided by 2). The answer will come out as 2.5. Is there a way i can make the answer in a fration such as 5 over 2?. Also preferably the answer should be in fraction form if the equation does not divide evenly and should be a whole number if it does divide evenly.

EX : (5 divided by 2 answer should be 5/2)
(6 divided by 2 answer should be 3 and not 3/1)

Thanks!

Quote:

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Is there a way i can make the answer in a fration such as 5 over 2

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You have to manually do it.
Take the double...
Depending on the no of significant figures, multiply by powers of 10.
Now the fraction is (d*100..)/100..
Use the HCF of the Numerator and Denominator to divide both.
You've got your fraction.

Additionally, what are you doing with main()? I don't think I have seen that before, read How to define main()-FAQ

Sorry im really really really really new to C++ and i've only been learning for 3 days. Could you explain to me in simpler terms please? =\

Quote:

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Originally Posted by AndrewHunter

Additionally, what are you doing with main()? I don't think I have seen that before, read How to define main()-FAQ

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I thought about that too, but is it applicable in certain scenarios ? ..like say...main receiving arguments from places other than the terminal ?

Quote:

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Originally Posted by iluvanimestyle

Sorry im really really really really new to C++ and i've only been learning for 3 days. Could you explain to me in simpler terms please? =\

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There was nothing specific to programming in my explanation... It is just a little arithmetic.

Code:

---

#include <iostream>
#include <cmath>

using namespace std;

int main (void)
{
    double midpointx;
    double midpointy;
    double x1;
    double y1;
    double x2;
    double y2;
    cout << "First Coordinate.\n" << endl << "Enter x " << endl;
    cin >> x1;
    cout << "Enter y " << endl;
    cin >> y1;
    cout << "Second Coordinate.\n" << endl << "Enter x " << endl;
    cin >> x2;
    cout << "Enter y " << endl;
    cin >> y2;

    midpointx = (x1 + x2)/2;
    midpointy = (y1 + y2)/2;

    cout << "The midpoint of your two coordinates is: ( " << (midpointx) << " , " << (midpointy) << " ). " << endl;
    cin.get();
    return 0;
}

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so the code should be changed to this?

The second version is better...

This...

Code:

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int main (double x1 , double y1 , double x2 , double y2)

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... is NOT how you define variables.

Quote:

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Originally Posted by CommonTater

The second version is better...

This...

Code:

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int main (double x1 , double y1 , double x2 , double y2)

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... is NOT how you define variables.

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i just have a few questions
what does putting variables inside the parenthesis in int main mean?
I did it and it was able to run so whats wrong with my first version?

Quote:

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what does putting variables inside the parenthesis in int main mean?

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That main gets them as arguments.... so they are valid identifiers.