Modernes C++ programmieren

//#(compile) c++; compiler:g132; options:-O3 -std=c++23; libs:-
// https://godbolt.org/z/dKPo7andE 
#include <iostream> 
#include <iomanip> // setprecision, fixed 
constexpr int framesPerSec = 25; 
constexpr int runtimeInSecs = 3600; 
constexpr int framesTotal = runtimeInSecs * framesPerSec; 
constexpr float frametime = 1.0f / framesPerSec;
int main() {
    float filmtime = 0.f; 
    for(int n=1; n <= framesTotal; ++n) { // 1 .. framesTotal, because of formula
        filmtime = frametime * n;         // scale 
        // ... here code for this frame ... 
    } 
    std::cout << std::setprecision(10) << std::fixed 
        << filmtime << '\n';              // output: 3600.0000000000 
}