How should I do integer division in Perl?
What is a good way to always do integer division in Perl? For example, I want: real / int = int int / real = int int / int = int ...
What is a good way to always do integer division in Perl? For example, I want: real / int = int int / real = int int / int = int ...
I have two unsigned long longs X and Y, where X < Y, but both may be very large. I want to compute the first digit past the decimal point of X / Y. For example, if X is 11 and Y is 14, then 11 / 14 is .785…, so the result should be 7. (X * 10) / Y would work, except it produces the wrong result if X * 10 overflows. Conversion to doub...
I wrote a small software synth for the iPhone. To further tune performance I measured my application with Shark and found that I am loosing a lot of time in float/SInt16 conversions. So I rewrote some parts to get around the conversions by pre-calculating lookup tables that return "ready-to-use" SInt16 samples. This works fine so far. C...
Why is the output of the following code equals to 0 or serven? cout << 7/9*9; //output 0 (zero) why? float nine = 9; float seven = 7; float i = seven/nine*nine; cout << i //output 7 Why? Thanks for the help. ...
I was writing this code in C when I encountered the following problem. #include <stdio.h> int main() { int i=2; int j=3; int k,l; float a,b; k=i/j*j; l=j/i*i; a=i/j*j; b=j/i*i; printf("%d %d %f %f\n",k,l,a,b); return 0; } Can anyone tell me why the code is returning zero for the first and third variables ...
Here is the code I'm using in the example: PRINT @set1 PRINT @set2 SET @weight= @set1 / @set2; PRINT @weight Here is the result: 47 638 0 I would like to know why it's returning 0 instead of 0,073667712 ...
I have a 128-bit number stored as 2 64-bit numbers ("Hi" and "Lo"). I need only to divide it by a 32-bit number. How could I do it, using the native 64-bit operations from CPU? (Please, note that I DO NOT need an arbitrary precision library. Just need to know how to make this simple division using native operations. Thank you). ...
The // "integer division" operator of Python surprised me, today: >>> math.floor(11/1.1) 10.0 >>> 11//1.1 9.0 The documentation reads "(floored) quotient of x and y". So, why is math.floor(11/1.1) equal to 10, but 11//1.1 equal to 9? ...
if I have something like: long x = 1/2; shouldn't this be rounded up to 1? When I print it on the screen it say 0. ...
Okay. I have been bashing my head against the wall for like 2 hours now trying to figure out why in the world double answer = 364/365; is telling me that answer is 0. Or any other combination of double for that matter, its just truncating the decimal and I just don't know why. Please help!!! ...
I'm messing around with writing a class similar to mpz (C) or BigInteger (Java). This is just for fun, so please don't go on about how I shouldn't be writing my own. I have a class similar to: public class HugeInt { public List<Integer> digits; public HugeInt(String value) { // convert string value into its sepera...
In the following C++ code, it should be impossible for ain integer division by zero to occur: // gradedUnits and totalGrades are both of type int if (gradedUnits == 0) { return 0; } else { return totalGrades/gradedUnits; //call stack points to this line } however Visual Studio is popping up this error: Unhandled exception ...
Please forgive my programming knowledge. I know this is a simple thing, but I do not understand why result is always 0. Why decimal will be fine? int a = 100; int b = 200; decimal c = (a / b) * 100; Many thanks. ...
Lets say I have a integer result and an array of integers, lets say [a,b,c] (not a fixed length). I need to detect if result=a*i +b*j + c*k, with i,j,k>=0. I prefer a solution in C/C# if it is possible. PS The problem is from a reservation system, a trip can be sold if its durations is a combination of given durations. Thanks! Ex:...
how do you divide two integers and get a decimal answer? in xcode.. the only thing i could was find http://www.gnu.org/s/libc/manual/html_node/Integer-Division.html this method will not allow me to have a decimal answer... ...
int num = 5; int denom = 7; double d = num / denom; this results in 0, I know you can force it to work by doing double d = ((double) num) / denom; but there has to be another way, right? I don't like casting primitives, who knows what may happen. ...
Hey, I'm writing a program that assigns prime numbers to each entry of a matrix and then I'll need to multiply some of them. The resulting number grows rapidly and I'm at a loss as to which type to use, as I'm getting "wrap-around" with long double :S All the help is appreciated. -Pickel ...
I've been programming for a while in C++, but suddenly had a doubt and wanted to clarify with the Stackoverflow community. When an integer is divided by another integer, we all know the result is an integer and like wise, a float divided by float is also a float. But who is responsible for providing this result? Is it the compiler or D...
I started using Python in 2001. I loved the simplicity of the language, but one feature that annoyed the heck out of me was the / operator, which would bite me in subtle places like def mean(seq): """ Return the arithmetic mean of a list (unless it just happens to contain all ints) """ return sum(seq) / len(seq) F...
This is (AFAIK) a specific question within this general topic. Here's the situation: I have an embedded system (a video game console) based on a 32-bit RISC microcontroller (a variant of NEC's V810). I want to write a fixed-point math library. I read this article, but the accompanying source code is written in 386 assembly, so it's nei...