This code defines a function called `calculateAverage` that calculates the...

November 21, 2023 at 08:39 AM

#include <iostream> #include <cstdarg> #include <Windows.h> double calculateAverage(int numElements, ...) { va_list args; va_start(args, numElements); double sum = 0.0; SetConsoleOutputCP(1251); SetConsoleCP(1251); for (int i = 0; i < numElements; ++i) { sum += va_arg(args, double); } va_end(args); return sum / numElements; } int main() { double result1 = calculateAverage(3, 10.0, 20.0, 30.0); double result2 = calculateAverage(5, 5.0, 10.0, 15.0, 20.0, 25.0); std::cout << "Середнє (3 чисел): " << result1 << std::endl; std::cout << "Середнє (5 чисел): " << result2 << std::endl; return 0; }

This code defines a function called calculateAverage that calculates the average of a variable number of arguments. The function takes an integer numElements as its first parameter, which specifies the number of elements to average. The remaining arguments are a variable number of doubles.

Inside the function, the va_list type is used to declare a variable args that will hold the variable arguments. va_start is then called to initialize args with the variable arguments.

A sum variable is initialized to 0.0.

The Windows API functions SetConsoleOutputCP and SetConsoleCP are called to set the console code page to 1251.

A for loop iterates numElements times, and inside the loop, va_arg is used to retrieve the next double argument from args and add it to sum.

After the loop, va_end is called to clean up the args variable.

The function returns the average of the elements by dividing sum by numElements.

In the main function, calculateAverage is called twice with different number of elements and the results are stored in result1 and result2 variables.

Finally, the results are printed to the console using std::cout.

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