int cannot equal

So this is my code and apparently somethings going on at around the if statement. It makes my calculations show up as 0. I know it's some bizarre coding, but Im sure you guys get what's going on. Please let me know of what I can do for the mistake and also what I can do to improve or clean up my code. Thanks.

Jeremy

Code:

---



#include <iostream>

using namespace std;

int main()
{

int frank;
int john;
int userage;

//the reason I declared one as 1 was because I wasnt able to figure out how to divide a number by a variable in the If statement.
//Only a variable by a variable.

int one=1;

    //Fun

    cout << "My name is Jeremy Shawaf \n";
    cout << "Some things i like are desert parties and computers. \n";
    cout << "I like techno music, and I like computer science, hence it being my major :D \n\n";
    cout << "now that we got that out of the way....well frank is 27 years old, and john's age is unknown, but somehow....... \n";
    cout << "We seem to always get the same answer...why dont you enter in your age...\n";


    cin >> userage;

frank=27;
john=one/userage;

int totalages=(frank*userage*john);

    cout << "now if we multiply your age by john and frank's then we should get " << totalages << " which is frank's age. \n";

    if(totalages>=frank){
            cout << "yours, frank's and john's age multiplied together equals " << userage << " which is your age.";
    }

    //back to HW


    return 0;

}

---

An int can't hold a decimal value so your john=one/userage; division will make john equal to zero for all values of userage except 1.

Switch to double if you want to do decimal calculations.

Edit: See also this thread regarding floating point precision http://www.codeguru.com/forum/showthread.php?t=518005

Ohhhhhh I see, that completely makes sense. Yeah you cant tell it's a decimal unless you know what the cin is going to be........okay, well, thanks for the heads up Ill try changing it into a double. Thanks for the floating point reference also.

Jeremy

Also, I wanted to know......how can I make it so I can multiply numbers with my ints inside of my if statement.

Such as

if(john*4*frank>=27*one)
{
cout ect ect....;
}

How would I go about that?

That's a perfectly alright statement.

Okay, that's what I found out after I turned that int into a double, that was the reason why it wasnt working at first, great, thanks for that you guys, I cant wait til I start getting into more complicated code :) hehe but it's a great approach to think about all the ints and doubles and other values as such.

I will bring up anything else once it comes up, but with C++ is there much of a reason to clean up code like there is with html and CSS which I know arent languages, but they have their similarities.

Thanks again!