Thread: functions are killing me

I have this program and I can get everything to work except for the calculation of hours worked. Can someone look at my program and tell me what I have done wrong in using voide functions and reference parameters?

Code:

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

void initialize(int& a, int& b, char c);
void getHoursRate(double& h, double& r);
double payCheck(double h, double r, double wages);
void printCheck(double& hrs, double& rte, double& wage);
void funcOne(int& d, int& e);
void nextChar(char& t);

int main()
{
    int x,y;
    char z, ch;
    double hours, rate;
    double amount;
    
    
    
    initialize(x,y,z);
    cout<<"After initilialization: x = "<<x<<" y = "<<y<<" z= "<<z<<endl;
     
    
    cout<<fixed<<setprecision(2); 
    hours = 0;
    rate = 0; 
    amount = 0;
    
    getHoursRate(hours, rate);
    payCheck(hours, rate,amount);
    printCheck(hours, rate, amount);
    
    x=35;
    y=20;
    cout<<"Before calling funcOne x = "<<x<< ", y = "<<y<<endl;
    funcOne(x,y);
    cout<<"After funcOne: x = "<<x<<endl;
    
    z = 'B';
    cout<<"z = "<<z<<endl;
    nextChar(z);
    cout<<"After nextChar: z = "<<z<<endl;
    
    system ("pause"); 
    cout<<"Press any key to continue "<<endl;
    cin.get(ch);
    
    return 0;
    
}


//function definitions
void initialize(int& a, int& b, char c)            //definition of initialize step 1A.
{
    a = 0;
    b=0;
    c = ' ';
    
}

void getHoursRate(double& h, double& r)      //definition of getHoursRate step 1B.      
{
    
    cout<<"Enter hours worked: "<<endl;
    cin>>h;

    cout<<"Enter pay rate: "<<endl;
    cin>>r;
    
}

double payCheck(double h, double r, double wages)
{
    if (h > 40.00)
    wages = (40.0 * r) + 
        (1.5 * r * (h - 40.0));
    
    else
    wages = h * r;
        
    return wages;
}

void printCheck(double& hrs, double& rte, double& wage)
{
    cout<<fixed<<setprecision(0);
    cout<<setfill(' ')<<left<<setw(25)<<"Hours worked: "<<right<<setw(10)<<hrs<<endl;
    cout<<setfill(' ')<<left<<setw(25)<<"Pay Rate:  " <<right<<setw(10)<<"$"<<rte<<endl;
    cout<<setfill(' ')<<left<<setw(25)<<"This week's salary:  "<<right<<setw(10)<<"$"<<wage<<endl;
    
}

void funcOne(int& d, int& e)
{
    int num;
    
    cout<<"Enter an integer: "<<endl;
    cin>>num;
    d = (2 * d) + (e - num);
    
    
}

void nextChar(char& t)
{
       t = 'C';
       
}

In the void printCheck function I should be able to get the hours worked, the rate of pay and the amount paid. But all I get are zero's. HELP!

Here is a little something I whipped up.. (it took me weeks to do this program in assembly.. what took me 20 minutes to write in c++) Anywhoo.. it demostrates functions.. function prototyping.. function definitions.. how to pass values into your functions.. and how to use the return value of your functions. Also, it demonstrates how to use some of the <cctype> library functions. It's also good for those who haven't got into classes yet.

Code:

#include<iostream>
#include<cstring>
#include<cctype>
#include<conio.h>

using namespace std;

//Function Prototypes
bool is_vowel(const char&);      
int  get_vowels(char*);
int  get_consonants(char*);
int  get_numbers(char*);

//Global Variables
int other;

int main()
{

	do{

	::other = 0;

	char input[81];

	clrscr();
	
	cout << "\n\tWelcome to String Manager";
	cout << "\n\n\n\nEnter String: ";

	cin.getline(input, 80);

	cout << endl << endl;
	cout << "\n\nThere are " << get_vowels(input)		<< " vowels.";
	cout << "\n\nThere are " << get_consonants(input)	<< " consonants.";
	cout << "\n\nThere are " << get_numbers(input)		<< " numbers.";
	cout << "\n\nThere are " << strlen(input)-::other	<< " other characters.";
	cout << "\n\nThere are " << strlen(input)		<< " total characters.";
	cout << "\n\n\nAgain? (Y/N) ";
	
	}while (toupper(getch()) == 'Y');

	return 0;	
}



//Function Definitions
bool is_vowel(const char& input)
{
	switch(toupper(input))
	{
		case 'A': 
		case 'E':
		case 'I':
		case 'O':
		case 'U': return true;	

		default:  return false;
	}
}


int get_vowels(char* input)
{
	int counter = 0;

	for (int c=0; c < strlen(input); c++)
	{
		if(is_vowel(input[c]))
		{
			++counter;
			++::other;
		}
	}

	return counter;
}



int get_consonants(char* input)
{
	int counter = 0;

	for (int c=0; c < strlen(input); c++)
	{
		//IF input[c] is an alphabetic character, but not a vowel
		if(isalpha(input[c]) && !is_vowel(input[c]))
		{
			++counter;
			++::other;
		}
	}

	return counter;
}



int get_numbers(char* input) 
{
	int counter = 0;

	for (int c=0; c < strlen(input); c++)
	{
		if(isdigit(input[c]))
		{
			++counter;
			++::other;
		}
	}

	return counter;
}

You just need a variable to hold the return value for

Code:

payCheck(hours, rate,amount);

ie

Code:

double value=payCheck(hours, rate,amount);