C ++ high

C ++ high_resolution_clock很奇怪的输出(C++ high_resolution_clock weird output)

我目前正在尝试计算cpp中循环的增量时间。 目前我使用此代码

#include <chrono> int main() { typedef std::chrono::high_resolution_clock Clock; typedef std::chrono::duration<float> fsec; auto lastTime = Clock::now(); auto currentTime = Clock::now(); fsec passedTime = currentTime - lastTime; while (true) { lastTime = currentTime; printf(""); printf(""); printf(""); printf(""); printf(""); printf(""); printf(""); printf(""); printf(""); printf(""); currentTime = Clock::now(); passedTime = currentTime - lastTime; printf("%i\n", passedTime.count()); } return 0; }

这不是我在程序中使用的实际代码，但增量时间计算和输出与此示例中的完全相同。

它曾经很好地工作，并且当GLFW锁定到60个刻度/秒时输出大约约0.0167，并且在大约6k刻度/秒时输出更低的数字。

我的问题是我将所有东西从main函数转移到一个方法中，现在得到这个结果

似乎我错误地改变了一些东西，但我无法弄清楚我改变了什么。

I am currently trying to calculate the delta time of a loop in cpp. Currently i use this code

#include <chrono> int main() { typedef std::chrono::high_resolution_clock Clock; typedef std::chrono::duration<float> fsec; auto lastTime = Clock::now(); auto currentTime = Clock::now(); fsec passedTime = currentTime - lastTime; while (true) { lastTime = currentTime; printf(""); printf(""); printf(""); printf(""); printf(""); printf(""); printf(""); printf(""); printf(""); printf(""); currentTime = Clock::now(); passedTime = currentTime - lastTime; printf("%i\n", passedTime.count()); } return 0; }

This is not the actual code i use in the program but the delta time calculation and the output is the exact same as in this sample.

It used to work fine and output a number of about ~0.0167 when locked to 60 ticks/s by GLFW and a ways lower number that at about 6k ticks/s.

My Problem is that I shifted everything out of the main function into a method and now get this result

It seems like I changed something by mistake but I can't figure out what I've changed.

最满意答案

你的printf错了，数据是浮点数，但printf格式是int。

Your printf is wrong, the data is a float, but the printf format is an int.