#include#include int main() { Eigen::Vector3d v(1, 2, 3); std::cout << "Norm of v: " << v.norm() << std::endl; return 0; }
#includeThis example demonstrates how to calculate the norm of a 3-dimensional vector using a custom `Vector3d` struct in C++. The norm of the vector `v` with components (1, 2, 3) is calculated using a custom `norm()` function. The package library used in these examples is Eigen, a C++ template library for linear algebra. However, the second example also uses the standard library function `std::sqrt()` for calculating the square root.#include #include struct Vector3d { std::array data; Vector3d(double x, double y, double z) : data({x, y, z}) {} double norm() const { return std::sqrt(data[0]*data[0] + data[1]*data[1] + data[2]*data[2]); } }; int main() { Vector3d v(1, 2, 3); std::cout << "Norm of v: " << v.norm() << std::endl; return 0; }