Undefined Reference to "function" error

[pgagl623]

Hello! I am new to this forum and to coding so any pointers would be greatly appreciated. I am currently working on a code, but I keep getting a error as follows:

[Linker error] undefined reference to 'getHoursOfTheWeek(double)'
[Linker error] undefined reference to 'getGrossPay(double)'
[Linker error] undefined reference to 'getStateTax(double)'
[Linker error] undefined reference to 'getFederalTax(double)'
[Linker error] undefined reference to 'getFICA(double)'
[Linker error] undefined reference to 'getWithHoldingAmount(double)'

I have been trying to debug this error for hours and I am completely stumped. Any help would be appreciated, and my apologies if I didn't post correctly.

Project 4 Code:

//

//BEGIN

#include <iostream>
#include <iomanip>
#include <string>

using namespace std;

string getUserName();
double getPayRate();
double getTotalPay();
double getGrossPay(double GrossPay);
double getStateTax(double StateTax);
double getFederalTax(double FederalTax);
double getHoursOfTheWeek(double HoursOfTheWeek);
double getFICA(double FICA);
double getWithHoldingAmount(double WithHolding);
void displayAmountDue(string UserName,double GrossPay,double WithHolding,double NetPay);


int main()
{
    string UserName;
    double PayRate, TotalPay, GrossPay, StateTax, FederalTax, FICA, WithHolding;
    
    //Get users name
    UserName = getUserName();
    
    //Get hourly pay rate
    PayRate = getPayRate();
    
    //Get Hours of the week
    TotalPay = getHoursOfTheWeek(TotalPay);
    
    //Calculate gross pay
    GrossPay = getGrossPay(GrossPay);
    
    //Calculate state tax
    StateTax = getStateTax(StateTax);
    
    //Calculate federal tax
    FederalTax =  getFederalTax(FederalTax);
    
    //Calculate FICA tax
    FICA = getFICA(FICA);
    
    //Calculate WithHolding amount
    WithHolding = getWithHoldingAmount(WithHolding);
    
    //Display results
    displayAmountDue(UserName, GrossPay, WithHolding, NetPay);
    
    return 0;
}

string getUserName()
{
    string UserName;
    cout<<"Please enter your name: ";
    cin>>UserName;
    
    return UserName;
}

double getPayRate()
{
    double PayRate;
    cout<<"Please enter your hourly pay: ";
    cin>>PayRate;
    
    return PayRate;
}

double getHoursOfTheWeek(int workDay, int TotalHours)
{
       int m;
       cout<<"How many days have you worked this week?";
       cin>>workDay;
       
       if (workDay == 1)
       {
       cout<<"Please enter the amount of hours you have worked on Monday: ";
       cin>>m;
       
       TotalHours = m;
       cout<<"Your total hours are: "<<TotalHours<<endl;
       
      
      return TotalHours;
       }
       
       else if (workDay == 2)
        {
            int m, t;
            cout<<"Please enter the amount of hours you have worked on Monday: ";
            cin>>m;
            cout<<"Please enter the amount of hours you have worked on Tuesday: ";
            cin>>t;
            
            TotalHours = m+t;
            cout<<"Your total hours are: "<<TotalHours<<endl;
            
            return TotalHours;
        }
        else if (workDay ==3)
        {
            int m, t, w;
            cout<<"Please enter the amount of hours you have worked on Monday: ";
            cin>>m;
            cout<<"Please enter the amount of hours you have worked on Tuesday: ";
            cin>>t;
            cout<<"Please enter the amount of hours you have worked on Wednesday: ";
            cin>>w;
            
            TotalHours = m+t+w;
            cout<<"Your total hours are: "<<TotalHours<<endl;
            
            return TotalHours;
        }
        else if (workDay ==4)
        {
            int m, t, w, th;
            cout<<"Please enter the amount of hours you have worked on Monday: ";
            cin>>m;
            cout<<"Please enter the amount of hours you have worked on Tuesday: ";
            cin>>t;
            cout<<"Please enter the amount of hours you have worked on Wednesday: ";
            cin>>w;
            cout<<"Please enter the amount of hours you have worked on Thursday: ";
            cin>>th;
            
            TotalHours = m+t+w+th;
            cout<<"Your total hours are: "<<TotalHours<<endl;
            
            return TotalHours;
        }
        else if (workDay ==5)
        {
            int m, t, w, th, f;
            cout<<"Please enter the amount of hours you have worked on Monday: ";
            cin>>m;
            cout<<"Please enter the amount of hours you have worked on Tuesday: ";
            cin>>t;
            cout<<"Please enter the amount of hours you have worked on Wednesday: ";
            cin>>w;
            cout<<"Please enter the amount of hours you have worked on Thursday: ";
            cin>>th;
            cout<<"Please enter the amount of hours you have worked on Friday: ";
            cin>>f;
            
            TotalHours = m+t+w+th,f;
            
            cout<<"Your total hours are: "<<TotalHours<<endl;
            
            return TotalHours;
        }
}

double GetGrossPay(double TotalHours, double PayRate)
{
      double GrossPay;
      GrossPay = TotalHours * PayRate;
      
      return GrossPay;
}

double GetStateTax(double GrossPay)
{
    double StateTax;
    StateTax = GrossPay * 1.25;
       
    return StateTax;
}

double GetFederalTax(double GrossPay)
{
       double amount, FederalTax;
       
       if (GrossPay<500)
       {
            amount = GrossPay * .15;
       }
       
       else
       {
           amount = GrossPay * .25;
       }
       
       return FederalTax;
}

double GetFica(double GrossPay)
{
       double FICA;
       
       FICA = GrossPay * 7.65;
       
       return FICA;
}

double getWithHoldingAmount(double WithHolding, double StateTax, double FederalTax, double FICA)
{
       WithHolding = StateTax + FederalTax + FICA;
       
       return WithHolding; 
}
void displayAmountDue(string UserName, double GrossPay, double WithHolding))
{
     cout<< "UserName:                 "<<UserName<<endl;
     cout<< "Gross Pay:                "<<GrossPay<<endl;
     cout<< "Total Withholding amount: "<<WithHolding<<endl;
}

//END

[booradley60]

Lines 11-20 are the function prototypes. They need to match the actual functions written at the bottom of this listing. When I say match, I mean that the return type, the name of the function, and the types of all the parameters should match.

This code compiles, because you made a promise (those prototypes) that those functions would be defined. However, when the linker got a hold of your code, it couldn't find those definitions! It only found definitions for other functions that had the same name, but all the parameter types were different.

[pgagl623]

Ahh, that makes sense. No wonder it couldn't link the functions. I guess I've been staring at this for too long and overlooked a simple mistake. With a little debugging and slight changes it finally compiles! Thank you very much for your time, I greatly appreciate it.

-Patrick