Indirectly setting a variable to a decimal

[x1ionu]

I wrote a script in Lua to calculate pi using an infinite equation (which worked), but when I wrote a very similar script in C++, it broke.

When I divide 1 by a value greater than 1, instead of setting f to a decimal less than 1, it just sets it to 0.

How do I force it to set f to a decimal value?

Also, I tried adding "\n" in several ways, but that seemed to break the script. Is this just because of the compiler that I'm using? (I usually don't have access to a computer so I have to use an app on my phone)

So basically this script should function if I can just fix this one thing. Thanks!

#include <iostream>
using namespace std;

int main() {
    int i = 1;
    int bank = 0;
    int d = 1;
    int f;
    int pi;
    
    while (true){
        f = 1/i; //Here's the trouble
        bank = bank + f * d;
        d = d * -1;
        i = i + 2;
        pi = bank * 4;
        cout << pi;
    }    
    return 0;
}

[E0p9LyTq]

Line 12 is working correctly. Setting an integer variable to a value less than 1 will truncate the value to zero. That is expected behavior.

You need to change your variable types for all your variables to float or double. Preferably double for the precision.

[x1ionu]

Thanks! I tried changing some of my variables to double and to float, but I didn't think to change all of them, so... yeah maybe next time I'll be smarter ;)

[E0p9LyTq]

You could also "tighten up" your code on lines 13(?)-15 with different operators:

bank += (f * d);
d *= -1;
i += 2;