What’s wrong? How to calculate the logarithm in this function? How to do input validation? How do I check for negative exponents? Why does the function exist when the logarithm is negative, but the code does not recognize it? I put restrictions on the negative logarithm, but the function for negative values of the logarithm ..

#### Category : sqrt

I need to evaluate the expression cbrt(b) / ((b)^2 + 1). If b less than zero, the log is not correct and outputs an incorrect answer. For example, if the input is -3 the answer is y = -1IND. #include <iostream> #include <cmath> int main() { float b, y, y1, y2; std::cout << "The equation: ..

C++ I need to evaluate the expression cbrt(b) / ((b)^2 + 1) if ‘b’ is only negative number log is not competent { y1 = cbrt(b); y2 = pow(b,2) + 1; y2 = 1 / y2; y = y1 * y2; cout << "y = "<< y << endl; } Source: Windows Que..

As a matter of curiosity, why are std::sqrt and std::pow overloaded just for a single type of parameter? Why are they not implemented as function/functor templates? Source: Windows Que..

In C++, is there a compile-time way to compute the largest value of an integral type T that can be safely squared, i.e. that mathematically x * x <= std::numeric_limits<T>::max() so that if the operation x*x were to be performed, it would not cause undefined behavior (for signed types) or overflow (for unsigned types? I’m ..

I wrote this implementation of sqrt that is finite in complexity and precise up to the last digit when double is ieee754 double. The question is that is this portable on devices of various endian (assuming 0LL is still 64 bit)? get_fraction returns the 52bits plus the 1 bit at the begining. Small doubles are ..

writing a function for columnwise computation of sample skewness in Rcpp I’m in trouble using sqrt()-function. I know that sqrt(x) works for NumericVector types (tested it in a separate file), however in my code (where I’m trying to pass doubles) it does not work. Here’s my code: #include <Rcpp.h> #include <cmath> using namespace Rcpp; // ..

#include <iostream> #include <cmath> using namespace std; int main(){ int n; cin >> n; int i = sqrt(1 + 2 * n * (n + 1)) – 1; cout << i; } I have written a simple program which utilizes the sqrt() function in C++. The above program prints out a negative value on the ..

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