c++ - c++ if循环和函数

Question

在我的程序中，它首先询问员工人数。if 循环表示如果输入是输入 < 1，则输出说“请输入至少 1 的值”。如果您输入 0 或 -1，它会输出供用户更正，但它只执行一次。因此，如果用户输入 -1 两次，它将运行第二次。它也使用第二个 if 循环来执行此操作。

#include <iomanip>
#include <iostream>

using namespace std;

int getNumEmployees();
int getDaysMissed(int);
double getAverageDays(int,int);

int main()
{
    int numEmployees;
    int daysMissed;
    double average;

    //Get the number of employees
    numEmployees = getNumEmployees();

    //Get the number of days missed
    daysMissed = getDaysMissed(numEmployees);

    //Get the average days missed
    average = getAverageDays(numEmployees, daysMissed);

    cout << "The average number of days missed is: " << average << endl;

    system("pause");
    return 0;
}

int getNumEmployees()
{
    int employeeNum;

    cout << "Enter the number of company employees: ";
    cin >> employeeNum;

    if(employeeNum < 1)
    {
        cout << "Please enter a value greater than 0 " << endl;
        cin >> employeeNum;
    }

    return employeeNum;
}


int getDaysMissed(int employeeNum)
{
    int totalDays = 0;
    int employee;

    for(int count = 1; count <= employeeNum; count++)
    {
        cout << "Enter the number of days employee " << count << " missed: ";
        cin >> employee;
        if(employee < 0)
        {
            cout << "Enter a positive number for days missed " <<     endl;
            cin >> employee;
        }

        totalDays += employee;
    }
    return totalDays;
}

double getAverageDays(int employeeNum, int totalDays)
{
    double averageDays;
    averageDays = totalDays / employeeNum;
    return averageDays;
}

Answer 1

改变这个：

if(employeeNum < 1)

对此：

while(employeeNum < 1)

你想要循环。正如克里斯提到的那样，if没有循环。