Поливариантные условия - C++ - Ответ 1762106

#include <iostream>
#include <math.h>
 
int main()
{
    int num;
    std::cout << "Enter the number (1 - 4 (cat, hyp, h, S)) and the element:\n";
    float x;
    std::cin >> num >> x;
    switch(num)
    {
        case 1:
            std::cout << "hypotenuse = " << x * sqrt(2) << std::endl;
            std::cout << "height = " << x * sqrt(2) / 2. << std::endl;
            std::cout << "area = " << (x * sqrt(2)) * (x * sqrt(2) / 2.) << std::endl;
            break;
        case 2:
            std::cout << "cathetus = " << x / sqrt(2) << std::endl;
            std::cout << "height = " << x / 2. << std::endl;
            std::cout << "area = " << x * (x / 2.) << std::endl;
            break;
        case 3:
            std::cout << "cathetus = " << x * sqrt(2) << std::endl;
            std::cout << "hypotenuse = " << x * 2. << std::endl;
            std::cout << "area = " << x * (x * 2.) << std::endl;
            break;
        case 4:
            std::cout << "cathetus = " << sqrt(x * 2.) << std::endl;
            std::cout << "hypotenuse = " << sqrt(x / 2.) * 2 << std::endl;
            std::cout << "height = " << sqrt(x / 2.) << std::endl;
            break;
        default:
            std::cout << "you entered the wrong data ... you must understand, you are useless... if you understand, press \"Enter\"\n";
            break;
    }
    system("pause");
    return 0;
}