If I do something like this: float a = 1.5f; float b = a; void func(float arg) { if (arg == 1.5f) printf("You are teh awresome!"); } func(b); Will the text print every time (and on every machine)? EDIT I mean, I'm not really sure if the value will pass through the FPU at some point even if I'm not doing any calculations, and if ...
Hi, I have the following dummy test script: function test(){ var x = 0.1 * 0.2; document.write(x); } test(); This will print the result "0.020000000000000004" while it should just print "0.02" (if you use your calculator. As far as I understood this is due to errors in the floating point multiplication precision. Does anyone...
What’s the best, platform-independent way to obtain the maximum value that can be stored in a float in C++? ...
I expected the following code to produce: "Both are equal", but I got "Both are NOT equal": float a=1.3f; double b=1.3; if(a==b) { System.out.println("Both are equal"); } else{ System.out.println("Both are NOT equal"); } What is the reason for this? ...
If I have an EditText component on my screen that I have specified inputType="decimal" for (i.e. a numeric/decimal field), what is the best way to convert it to an decimal value in the application code? Google recommends avoiding floats, and avoiding creating objects unnecessarily (and I assume any auto-unboxing code is bad too), so I...
int main(void){ float x =1; float y =2; while (x<y){ x = x +1 ; y = y +1; } printf("x is %d\n", x); printf("y is %d\n", y); } I would expect x and y to increase to the point we run out of bits, but it seems like x and y is alway 0 in this case... ...
Is there a C++ version of the isnormal, isnan and so C functions? I know I can use the C functions from C++, but I'm always interested to know if there are some C++-only alternatives. ...
What I mean is the following: double d1 =555; double d2=55.343 I want to be able to tell that d1 is an integer while d2 is not. Is there an easy way to do it in c/c++? ...
I'm writing a utility to calculate π to a million digits after the decimal. On a 32- or 64-bit consumer desktop system, what is the most efficient way to store and work with such a large number accurate to the millionth digit? clarification: The language would be C. ...
I'm running into an issue with floating point exceptions turned on in Visual Studio 2005. If I have code like this: double d = 0.0; double d2 = 3.0; double d3 = d2/d; and if I register an SEH handler routine, then I can easily turn the div-by-zero into a C++ exception and catch it. So far so good. However, when I do this, the f...
I just read a statement about the floating point value comparison Floating point values shall not be compared using either the == or != operators. Most floating point values have no exact binary representation and have a limited precision. If so what is the best method for comparing two floating point values? ...
I have two double a, b; I know that the following is true -1 <= a/b <= 1 however b can be arbitrarily small. When I do this naively and just compute the value a/b the condition specified above does not hold in some cases and I get values like much greater than 1 in absolute value (like 13 or 14.) How can I ensure that when ...
what is the best way to handle big integers in expr command. we know wide in expr. ...
How to convert a double into a floating-point string representation without scientific notation in the .NET Framework? "Small" samples (effective numbers may be of any size, such as 1.5E200 or 1e-200) : 3248971234698200000000000000000000000000000000 0.00000000000000000000000000000000000023897356978234562 None of the standard number...
When I try to take the N th root of a small number using C# I get a wrong number. For example when I try to take the 3rd root of 1.07, I get 1, which is clearly not true. Here is the exact code I am using to get the 3rd root. MessageBox.Show(Math.Pow(1.07,(1/3)).toString()); Can anyone tell me how to solve this problem. I would gue...
Is there a Java equivalent of the C / C++ function called frexp? If you aren't familiar, frexp is defined by Wikipedia to "break floating-point number down into mantissa and exponent." I am looking for an implementation with both speed and accuracy but I would rather have the accuracy if I could only choose one. This is the code sampl...
Using the following code snippet: (fromIntegral 100)/10.00 Using the Haskell '98 standard prelude, how do I represent the result with two decimals? Thanks. ...
Why do comparisons of NaN values behave differently from all other values? That is, all comparisons with the operators ==, <=, >=, <, > where one or both values is NaN returns false, contrary to the behaviour of all other values. I suppose this simplifies numerical computations in some way, but I couldn't find an explicitly stated reaso...
Hi, I have following code: float totalSpent; int intBudget; float moneyLeft; totalSpent += Amount; moneyLeft = intBudget - totalSpent; And this is how it looks in debugger: http://www.braginski.com/math.tiff Why would moneyLeft calculated by the code above is .02 different compared to the expression calculated by the ...
x = 4.2 - 0.1 vb.net gives 4.1000000000000005 python gives 4.1000000000000005 Excel gives 4.1 Google calc gives 4.1 What is the reason this happens? ...