[Solved] How to simplify this Fortran function?

It is possible to write this using recursion. Note that count_present(p_1, p_2, …, p_n, p_{n+1}) returns the value count_present(p_1, p_2, …, p_n) unless all p_1, …, p_{n+1} are present and .TRUE.. In this latter case the result is n+1. count_present(p_1) returns 1 if p_1 is .TRUE., 0 otherwise. recursive function count_present(p1, p2, p3, p4, p5, … Read more

[Solved] is there an equivalent to ‘classname.this’ from java in c++?

Are you sure the definition is actually defining function onChar in class Game and not in class Screen? If you accidentally wrote this as the definition for onChar (which I can imagine could easily happen): void Screen::KeyListener::onChar(char c) {} then you are defining function in class Screen. solved is there an equivalent to ‘classname.this’ from … Read more

[Solved] C++ Why is my program throwing an exception?

You made variable with name that matches type name (string variable, string type?). Plus there is issue that you return pointer to object with local scope of life. That is UB. Using iterators your function would work like this: const string shortest_string(initializer_list<string> strings) { if(!strings.size()) return string(); auto shortest_one = strings.begin(); for (auto it = … Read more

[Solved] C++ functions, pass by reference

I’m not going to answer with a complete solution (and you are free to improve your question so you get better answers later), but regarding the question title, here are some hints. Your declaration char displaymenu(int num1, int num2); and your definition char displaymenu(int &num1 = num1, int &num2 = num2) should have the same … Read more

[Solved] C – Read and write bytes from memory

This is not “pure C” question, because C language standard doesn’t define how to access physical, linear or virtual memory at given address. In many or most environments, operating system won’t never let you directly access physical memory, or will only let you access physical memory if you ask it. For example on Linux with … Read more

[Solved] Function won’t work as I want them to work (c)

This code doesn’t compile when y and z are not defined. Adding float in front of those variables and altering the path to run this I found the following errors: First, loading the data into a failed for me: a[ROW][COLUMN] = {0} produced a garbage array so I dropped the initialization to get just: a[ROW][COLUMN] … Read more

[Solved] How do I join a list and then delete the last character?

If I understand what you’re trying to do correctly, you can just do this: def littery(lst): return ”.join(lst)[:-1] >>> littery([‘Andy’, ‘Warhol’]) ‘AndyWarho’ Or if you want to take the last element off of each element of lst, you could do this: def littery(lst): return ”.join(word[:-1] for word in lst) >>> littery([‘Andy’, ‘Warhol’]) ‘AndWarho’ Or if … Read more

[Solved] C++: virtual functions with multiple derivations

You’re right, C::fn() is called when my example is ran alone. My problem actually was that I was dynamically loading this class (C) with ros:pluginlib (http://ros.org/wiki/pluginlib) so the multiple inheritance issue is probably coming from there. That’s a completly different issue I’ll have to look into. solved C++: virtual functions with multiple derivations