write a C++ A program that must meet strict performance or reliability requirements, which may require careful planning and testing.

Answer

#include <iostream> #include <vector> #include <chrono> int main() { // Initialize a vector with 1 million integers std::vector<int> v(1000000); // Measure the time it takes to sum the elements of the vector auto start = std::chrono::high_resolution_clock::now(); int sum = 0; for (int i : v) { sum += i; } auto end = std::chrono::high_resolution_clock::now(); // Print the time elapsed and the result std::chrono::duration<double> elapsed = end - start; std::cout << "Sum: " << sum << std::endl; std::cout << "Elapsed time: " << elapsed.count() << " seconds" << std::endl; return 0; }

OUTPUT