std

std::chrono::system_clock::time_point m_BeginFrame = std::chrono::system_clock::now(); std::chrono::system_clock::time_point m_EndFrame = std::chrono::system_clock::now(); std::chrono::nanoseconds m_WorkTime = std::chrono::nanoseconds::zero(); std::chrono::nanoseconds m_WaitTime = std::chrono::nanoseconds::zero(); auto invFpsLimit = std::chrono::nanoseconds(1e9 / fpsLimit()); // main loop while (!glfwWindowShouldClose(m_pScreen->glfwWindow())) { m_WaitTime = m_BeginFrame - m_EndFrame; m_EndFrame = std::chrono::system_clock::now(); m_WorkTime = m_EndFrame - m_BeginFrame; // if need sleep if (m

I'm trying to use a std::string as a key in a std::map however, i'm unable to find() correctly. My code is somewhat complicated and large so this is a small program that demonstrates the problem I'm having. If someone could tell me why this doesn't work, i'd be very grateful. Thanks. #include <stdio.h> #include <string> #include <map> struct comparer { public: bool operator()(const std::string x, const std::string y) { return x.compare(y)==0; } }; int main(int argc, char *argv[]) { std::map<std::string, int, comparer> numbers; numbers.insert(std::pair<std::string,int>("One",1)); numbers.insert

I am using the in-built function qsort() to sort a vector of class item pointers. class item { int value; vector<char> c; ... ... }; //Declaration of vector vector<item*> items; //Function Call qsort(&items, items.size(), sizeof(item*), value_sort); int value_sort(const void* a, const void* b) { item* pa = *(item**) a; item* pb = *(item**) b; if (pb->value < pa->value) return 1; else if (pa->value < pb->value) return -1; return 0; } In the debugger mode, pointers neither pa nor pb point to a valid location. Set of all data members of the class items pointed by either pa or pb contain garbage

I want to validate all the elemnent of an array. If an element is under a value, swap by a min value and if it is above a value, swap by a max value. But I don´t know how I can do it optimized. For do it I go above all elements, element by element but it is not optimized, and it spend a lot of cpu time in very large arrays. This is an example of my code: #include <iostream> #include <math.h> const int MAX = 10; int main () { float minVal = 2.0; float maxVal = 11.0; float vElem[] = {-111111.0/0.0, 10.0, 90.0, 8.0, -7.0, -0.6, 5.0, 4.0, 33.0, 222222222.0/0}; for(int i=0; i<MAX; i++){ if(isinf

Is there a way to use boost or std bind() so I could use a result as a callback in C API? Here's sample code I use: #include <boost/function.hpp> #include <boost/bind/bind.hpp> typedef void (*CallbackType)(); void CStyleFunction(CallbackType functionPointer) { functionPointer(); } class Class_w_callback { public: Class_w_callback() { //This would not work CStyleFunction(boost::bind(&Class_w_callback::Callback, this)); } void Callback(){std::cout<<"I got here!\n";}; }; Thanks! No, there is no way to do that. The problem is that a C function pointer is fundamentally nothing more than an