Cheating solution goes like this: string number = wholeNumber + “.” + decimal double doubleNumber = Double.Parse(number); Clean solution would involve checking how many values you have in the ‘decimal’, dividing by 10^amount and adding them As was pointed out – decimal seperator is cultural-specific – so the completly correct version is string number = … Read more
From GCC manual: -O3 Optimize yet more. -O3 turns on all optimizations specified by -O2 and also turns on the -finline-functions, -funswitch-loops, -fpredictive-commoning, -fgcse-after-reload, -ftree-vectorize, -fvect-cost-model, -ftree-partial-pre and -fipa-cp-clone options. No of these optimizations are particularly unsafe. The only optimization that I see can change the result is -ftree-vectorize. In some cases, using vector instructions … Read more
You are calling function expecting float* with a pointer to int. In C++ it is an error and your code does not compile. In C you will most likely get a warning and undefined behaviour anyway. solved Why does my function print ‘0’?
This won’t end up well. The problem is that sometimes there are float errors when representing numbers in binary (which is what your computer does). For example, when adding 1 / 3 + 1 / 3 + 1 / 3 you might get 0.999999… and the number of decimal places varies greatly. ravi already provided … Read more
In integer math, 5/9 is 0, remainder 5. You want 5.0/9.0 instead. In C, what you do with a result has no effect on how it’s computed. So even though c is a float and you are storing the result of the math in a float, the math is still integer math because 5, 9, … Read more
Your question is very unclear; in the future, you’ll probably get better results if you post a clear question with a code sample that actually compiles and demonstrates the problem you’re actually having. Don’t make people guess what the problem is. If what you want to do is display a double-precision floating point number without … Read more
In C, double has at least as much precision as, and usually more than, float, and has at least the exponent range of, and usually more than, float. The C standard only requires that double be able to represent all the values of float: “The set of values of the type float is a subset … Read more
Binary floating point math is like this. In most programming languages, it is based on the IEEE 754 standard. The crux of the problem is that numbers are represented in this format as a whole number times a power of two; rational numbers (such as 0.1, which is 1/10) whose denominator is not a power … Read more