如何操作 C++ 中的函数根据条件输出不同的结果？

Question

我想知道如何使用 void 函数根据条件输出结果。我正在尝试创建一个 Windchill 计算器。

我可以添加什么来使下面的程序输出低于 4.8kph 速度的气温？ 我该怎么做才能使 print_result 无效以打印各种语句 - 例如 -20 至 -30 Windchill (WC) 的“穿 3 层”或 -30 至 -40 的“穿 5 层”？感谢那些可以提供帮助的人！

#include <iostream>
#include <cmath>
using namespace std;

bool is_cold(double V)
{
    bool is_windy;
    if (V <= 4.8)
    {
        is_windy = false;
    }
    else
        is_windy = true;
    return (is_windy);
}
int windchill_index(double T, double V)
{
    int WC;
    WC = 13.12 + 0.6215*T - 11.37*pow(V,0.16) + 0.3965*T*pow(V, 0.16);
    return (WC);
}
void print_result(double WC)
{
    cout << "From the input for tempearature and wind speed, the wind chill is: "<< WC << endl;
}

int main()
{
    double WC = 0, T = 0, V = 0;
    bool is_windy = false;
    if (!is_windy)
        {
            cout << "Please enter the air temperature in Celsius followed by the windpseed in kph: " << endl;
            cin >> T;
            cin >> V;

            is_windy = is_cold(V);
        }
    WC = windchill_index(T, V);

    print_result (WC);
    return 0;
}

Answer 1

您熟悉布尔逻辑运算符 and (&&) 和 or (||) 吗？另请务必在边界条件（-20、-30、-40）下进行测试，以确保获得所需的结果！

void print_result(double WC)
{
    cout << "From the input for tempearature and wind speed, the wind chill is: "<< WC << endl;
    if (WC <= -20 && WC > -30) {
       cout << "Wear 3 layers!" << endl;   
    } else if (WC <= -30 && WC > -40) {
       cout << "Wear 5 layers!" << endl;
    } else {
       cout << "Wear ALL the layers!" << endl;
    }
}

编辑:: 从评论中回答你的问题：

int main()
{
    double WC = 0, T = 0, V = 0;
    bool is_windy = false;
    if (!is_windy)
        {
            cout << "Please enter the air temperature in Celsius followed by the windpseed in kph: " << endl;
            cin >> T;
            cin >> V;

            is_windy = is_cold(V);
        }
    //If its windy we want to calculate the windchill index, otherwise just use the ambient temp
    if (is_windy) {
       WC = windchill_index(T, V);
    } else {
       WC = T
    }

    print_result (WC);
    return 0;
}