有关空函数的问题

Question

我知道我的代码是正确的，只有一件事。 输入第一周薪后，将显示所有内容。 但是当我输入另一个每周工资时，FWI，FIA和NET PAY不会显示。

这是我的代码：

#include <iostream>
#include <iomanip>

using namespace std;

//function prototypes
void getSalary(double &salary);
void calcFedTaxes(double salary, double FWT_RATE, double FICA_RATE, double &fwt, double &fica);
void calcNetPay(double salary, double fwt, double fica, double &netPay);
void displayInfo(double fwt, double fica, double netPay);

int main()
{
    //declare constants and variables
    const double .2;
    const double FICA_RATE = .08;
    double salary = 0;
    double fwt    = 0;
    double fica   = 0;
    double netPay = 0;

    //get salary
    getSalary(salary);

    //calculate the federal taxes
    calcFedTaxes(salary, FWT_RATE, FICA_RATE, fwt, fica);

    //calculate net pay
    calcNetPay(salary, fwt, fica, netPay);

    //display , gross, taxes, and net
    displayInfo(fwt, fica, netPay);

    while (salary != 0)
    {
        cout << "Weekly salary: ";
        cin >> salary;
    }    //end while

    return 0;
} //end of main function

//*****function definitions*****

void getSalary(double &salary)
{
    cout << "Weekly salary: ";
    cin >> salary;
} //end of getSalary

void calcFedTaxes(double salary, double FWT_RATE, double FICA_RATE, double &fwt, double &fica)
{
    fwt = salary * FWT_RATE;
    fica = salary * FICA_RATE;
}  //end of calcFedTaxes

void calcNetPay(double salary, double fwt, double fica, double &netPay)
{
    netPay = salary - fwt - fica;
} //end of calcNetPay 

void displayInfo(double fwt, double fica ,double netPay)
{
    cout << "FWT: " << fwt << endl;
    cout << "FICA: " << fica << endl;
    cout << "Net: " << netPay << endl;
} //end of displayInfo

Answer 1

这是因为您对displayInfo()调用不在 while循环中。 所以它只会被调用一次。 您需要将其移入循环并在其中使用适当的参数进行调用。