C＆＃x2B;＆＃x2B;未定义的引用`findgrosspay（employeeInfo，double，int）＆＃x27;

Question

我已经开始工作了几天的课程，遇到了一个错误，我不确定如何修复。

#include <iostream>             // for cin, cout, endl
#include <string>
#include <iomanip>              // formatting floats

using namespace std;
    
void programHeader();
void footer();
void printEmployeeInfo(struct employeeInfo);

struct employeeInfo 
{
    int employeeID;
    char employeeName[20];
    double payRate;
    int employeeType;
};

float findGrossPay(employeeInfo myEmployee, double , int);
void payrollDisplay(employeeInfo myEmployee, double, double, double, float, float);

//prototype declerations

int main()
{
    // decleration of variables 
    float inputNumber1;
    int num1;
    int num2;
    int num3;
    int num4;
    employeeInfo myEmployee[4];
    float totalGross;
    float totalNet;
    int maxName = 20;
    int location;

    double hoursArray[4];
    double grossPay[4];
    double tax[4];
    double netPay[4];

    // input section
    programHeader();
    
    num4 = 0;
    location = 0;
    
    for (int c = 0; c < 4; c++)  // fill in the array of structs
    {
        while (true);            // validation loop
        {
            cout << "Employee ID: ";
            cin >> num1;
            if (num1 > 0);
            {
                myEmployee[c].employeeID = num1;
                break;
            } // end if
            if (num1 <= 0)
            {
                cout << "\nERROR PLEASE TRY AGAIN" << endl;
            } // end else if
        } // end while
        cout << "Employee Name: ";
        cin.getline(myEmployee[c].employeeName, maxName);

        while (true);             // validation loop
        {
            cout << "Pay rate: ";
            cin >> num2;
            if (num2 > 0);
            {
                myEmployee[c].payRate = num2;
                break;
            } // end if
            if (num2 <= 0)
            {
                cout << "\nERROR PLEASE TRY AGAIN" << endl;
            } // end if
        } // end while

        while (true)            // validation loop
        {
            cout << "Type: ";
            cin >> num3;
            if ((num3 == 1) || (num3 == 0))
            {
                myEmployee[c].employeeType = num3;
                break;
            } // end if
            else
            {
                cout << "\nERROR PLEASE TRY AGAIN" << endl;
            } // end else

        } // end while 
    } // end for(c)

    for (int h = 0; h < 4; h++);            // parallel array to hold hours worked
    {
        
        cout << "Hours worked for " << myEmployee[num4].employeeName << ": ";
        cin >> hoursArray[num4];
        num4 = num4 +1;
    } // end for(h)

    // calculation section
   
    
    // displays the results
    
    for (int l = 0; l < 4; l++)             // l for location
    {
        grossPay[l] = findGrossPay(myEmployee[4], hoursArray[4], location);
        location = location + 1;
    } // end for(l)

    for (int t = 0; t < 4; t++)        // get taxes and net pay for each
    {
        tax[t] = grossPay[t] * (15 / 100);
        netPay[t] = grossPay[t] - tax[t];
    }
    
    for (int i = 0; i < 4; i++)
    {
        totalGross = totalGross + grossPay[i];
        totalNet = totalNet + netPay[i];
    } // end of for

    payrollDisplay(myEmployee[4], grossPay[4], tax[4], netPay[4], totalGross, totalNet);

    footer();

    system("PAUSE");
    return 0;
    
}// end of main

float findGrossPay(employeeInfo myEmployee[4], double hoursArray[4], int l)             // l stands for location
{
    float numGrossPay;

    if (myEmployee[l].employeeType == 1)            // management
    {
        numGrossPay = myEmployee[l].payRate * hoursArray[l]; 
    } // end if
    else if (myEmployee[l].employeeType == 0)           // union members
    {
        if (hoursArray[l] > 40)
        {
            numGrossPay = myEmployee[l].payRate * 40 + (hoursArray[l] - 40) * (myEmployee[l].payRate * 1.5);
        } // end if
        else
        {
            numGrossPay = myEmployee[l].payRate * hoursArray[l];
        } // end else
    } // end else if

    return numGrossPay;
}

void payrollDisplay(employeeInfo myEmployee[4], double grossPay[4], double tax[4], double netPay[4], float totalGross, float totalNet)
{
    cout << "------------------------------------------------------------" << endl;
    cout << "\nPayroll Report\n" << endl;
    cout << "ID \tName" << "\t\tGross Pay \tTax \tNet Pay" << endl;
    
    for (int i = 0; i < 4; i++)             // to print each employee
    {
        cout << myEmployee[i].employeeID << "\t" << myEmployee[i].employeeName << "\t\t" << grossPay[i]
            << "\t" << tax[i] << "\t" << netPay[i] << endl;
    } // for(i) 

    cout << "\nTotal Gross Pay \t$" << totalGross << endl;
    cout << "Total Net Pay \t$" << totalNet << endl;
}

它给我一个错误，说明main（）>

grossPay[l] = findGrossPay(myEmployee[4], hoursArray[4], location);

和

payrollDisplay(myEmployee[4], grossPay[4], tax[4], netPay[4], totalGross, totalNet);

Answer 1

“未定义的参考”错误是因为您的函数声明不匹配其定义。

您已经声明 findgrosspay（） and payrolldisplay（）作为单个employeeeeInfo和相关值员工，但是您的定义正在使用员工和价值观的 arrays ：

//declaration
float findGrossPay(employeeInfo myEmployee, double , int);

//definition
float findGrossPay(employeeInfo myEmployee[4], double hoursArray[4], int l)

// declaration
void payrollDisplay(employeeInfo myEmployee, double, double, double, float, float);

//definition
void payrollDisplay(employeeInfo myEmployee[4], double grossPay[4], double tax[4], double netPay[4], float totalGross, float totalNet)

因此，链接器找不到您实际上正在调用的功能的匹配定义。

而且，更糟糕的是，您称之为这些功能的地方正在访问数组元素 ，这是不确定的行为。

解决该问题后，您应该获取Programheader（） and footer（）的“未定义的参考”错误，因为他们的定义 完全地。

修复此操作后，您的代码还有其他问题：

• 如果> / loops > 。代码>;
• 您在某些地方错误地访问了数组，
• 您在某些计算中使用的是非初始化的变量

，请尝试使用更类似的内容：也就是说

#include <iostream>             // for cin, cout, endl
#include <string>
#include <iomanip>              // formatting floats
#include <limits>

using namespace std;
    
struct employeeInfo 
{
    int employeeID;
    string employeeName;
    double payRate;
    int employeeType;
};

//prototype declerations
void programHeader();
void footer();
int promptForNumber(const string &prompt, int minValue = 0, int maxValue = numeric_limits<int>::max());
string promptForString(const string &prompt);
float findGrossPay(const employeeInfo &myEmployee, double hours);
void payrollDisplay(const employeeInfo myEmployee[4], const double grossPay[4], const double tax[4], const double netPay[4]);

int main()
{
    // decleration of variables 
    employeeInfo myEmployee[4];
    double hours[4];
    double grossPay[4];
    double tax[4];
    double netPay[4];
    int num;

    // input section
    programHeader();

    for (int c = 0; c < 4; c++)  // fill in the array of structs
    {
        myEmployee[c].employeeID   = promptForNumber("Employee ID", 1);
        myEmployee[c].employeeName = promptForString("Employee Name");
        myEmployee[c].payRate      = promptForNumber("Pay rate", 1);
        myEmployee[c].employeeType = promptForNumber("Type", 0, 1);
    }

    for (int h = 0; h < 4; h++)            // parallel array to hold hours worked
    {
        hours[h] = promptForNumber("Hours worked for " << myEmployee[h].employeeName);
    }

    // calculation section
   
    for (int l = 0; l < 4; l++)             // l for location
    {
        grossPay[l] = findGrossPay(myEmployee[l], hours[l]);
    }

    for (int t = 0; t < 4; t++)        // get taxes and net pay for each
    {
        tax[t] = grossPay[t] * (15 / 100);
        netPay[t] = grossPay[t] - tax[t];
    }
    
    // displays the results
    payrollDisplay(myEmployee, grossPay, tax, netPay);

    footer();

    system("PAUSE");
    return 0;    
}

void programHeader()
{
    // print out something here...
}

void footer()
{
    // print out something here...
}

int promptForNumber(const string &prompt, int minValue, int maxValue)
{
    int num;

    while (true)            // validation loop
    {
        cout << prompt << ": ";

        if (cin >> num)
        {
            cin.ignore(numeric_limits<streamsize>::max(), '\n');
            if ((num >= minValue && num <= maxValue)
                break;
        }
        else
        {
            cin.clear();
            cin.ignore(numeric_limits<streamsize>::max(), '\n');
        }

        cout << "\nERROR PLEASE TRY AGAIN" << endl;
    }

    return num;
}

string promptForString(const string &prompt)
{
    string input;

    while (true)             // validation loop
    {
        cout << prompt << ": ";

        if (getline(cin, input) && !input.empty())
            break;

        cout << "\nERROR PLEASE TRY AGAIN" << endl;
    }

    return input;
}

float findGrossPay(const employeeInfo &myEmployee, double hours)
{
    if (myEmployee.employeeType == 1)            // management
    {
        return myEmployee.payRate * hours; 
    }

    // must be myEmployee.employeeType == 0      // union members
    if (hours > 40)
    {
        return myEmployee.payRate * 40 + (hours - 40) * (myEmployee.payRate * 1.5);
    }
    else
    {
        return myEmployee.payRate * hours;
    }
}

void payrollDisplay(const employeeInfo myEmployee[4], const double grossPay[4], const double tax[4], const double netPay[4])
{
    float totalGross = 0.0f;
    float totalNet = 0.0f;

    cout << "------------------------------------------------------------" << endl;
    cout << "\nPayroll Report\n" << endl;
    cout << "ID \tName" << "\t\tGross Pay \tTax \tNet Pay" << endl;
    
    for (int i = 0; i < 4; i++)             // to print each employee
    {
        cout << myEmployee[i].employeeID << "\t" << myEmployee[i].employeeName << "\t\t" << grossPay[i] << "\t" << tax[i] << "\t" << netPay[i] << endl;
        totalGross += grossPay[i];
        totalNet += netPay[i];
    }

    cout << "\nTotal Gross Pay \t$" << totalGross << endl;
    cout << "Total Net Pay \t$" << totalNet << endl;
}

，您可能会考虑移动hough /grosspay/税/netpay值 employeeeeeinfo struct，因此您必须仅管理1个数组而不是5个平行数组。