What is the C function to raise a number to a power

What's the best way to raise a number to a power?

2^1

2^2

2^3

etc....

Jun 1, 2022 in C++ by Nicholas
• 7,760 points • 518 views

No answer to this question. Be the first to respond.

Your answer

Your name to display (optional):

Email me at this address if my answer is selected or commented on:

Privacy: Your email address will only be used for sending these notifications.

What is the best way to use a HashMap in C++?

The ordered and unordered map containers (std::map and std::unordered map) are included in the standard library. The items in an ordered map are sorted by key, and insert and access are in O (log n). For ordered maps, the standard library often use red black trees. However, this is only an implementation detail. Insert and access are in O in an unordered map (1). It is simply another term for a hashtable. An illustration using (ordered) std::map: #include <map> #include <iostream> #include <cassert> int main(int argc, char ...READ MORE

answered Jun 10, 2022 in C++ by Damon
• 4,960 points • 831 views

0 votes

0 answers

What is the fastest way to transpose a matrix in C++?

I have a reasonably large matrix that I need to transpose. Assume, for example, that my matrix is a b c d e f g h ...READ MORE

Jul 15, 2022 in C++ by Nicholas
• 7,760 points • 681 views

0 votes

0 answers

What is the easiest way to initialize a std::vector with hardcoded elements?

I can make an array and initialise&nb ...READ MORE

Jun 27, 2022 in C++ by Nicholas
• 7,760 points • 589 views

0 votes

0 answers

What is the difference between cout, cerr, clog of iostream header in c++? When to use which one?

I looked up the differences between cout, ...READ MORE

Jul 27, 2022 in C++ by Nicholas
• 7,760 points • 718 views

0 votes

1 answer

In C++, what is a virtual base class?

When employing multiple inheritance, virtual base classes are used to prevent several "instances" of a particular class from appearing in an inheritance hierarchy. Consider the following example: class A { public: void Foo() {} ...READ MORE

answered Jun 10, 2022 in C++ by Damon
• 4,960 points • 515 views

0 votes

1 answer

What is a lambda expression in C++11?

In C++11, what is a lambda expression? A: It's the object of an autogenerated class with overloading operator() const under the hood. Closure is a type of object that is produced by the compiler. This 'closure' idea is similar to C++11's bind notion. Lambdas, on the other hand, usually produce better code. Full inlining is also possible with calls through closures. Q: When do you think I'd utilise one? A: Define "simple and tiny logic" and request that the compiler generate the code from the preceding question. You tell the compiler the expressions you wish to be inside the operator (). The compiler will produce everything else for you. Q: What kind of problem do they tackle that couldn't be solved before they were introduced? A: It's some form of syntactic sugar, like using operators instead of functions for custom add, subtract, and other operations... However, wrapping 1-3 lines of genuine logic to some classes, and so on, saves additional lines of needless code! Some engineers believe that if the number of lines is reduced, there is a lower likelihood of mistakes (which I agree with). Example of usage auto x = [=](int arg1){printf("%i", ...READ MORE

answered Jun 15, 2022 in C++ by Damon
• 4,960 points • 458 views

0 votes

1 answer

lower_bound == upper_bound

Lower bound: the initial greater-or-equal element. Upper bound: ...READ MORE

answered Jun 21, 2022 in C++ by Damon
• 4,960 points • 1,047 views

0 votes

1 answer

how could I use the power function in c/c++ without pow(), functions, or recursion

It is part of a series. Replace pow() with the previous iteration's value. There is no need for code to call pow (). Pow(x, 5 * I - 1) and pow(-1, I - 1) may be formed since both have an int exponent dependent on the iterator I from the previous loop iteration. Example: Let f(x, i) = pow(x, 5 * i ...READ MORE

answered Jun 21, 2022 in C++ by Damon
• 4,960 points • 2,514 views

0 votes

0 answers

Finding square root without using sqrt function?

I tried to incorporate the technique I had discovered for calculating the square root without utilising the sqrt function into programming. I finally have this C++ code that runs. #include <iostream> using ...READ MORE