Visual C++ :: Employee Payroll - Read Data From Text File And Sort

i tring to write a employee payroll code with functions and read data from the txt. file and also bubble sort that sorts and displays starting from employees last name and calculations.

//txt file//
Hours Pay rate empID first name last name
40.0 10.00 A1234 Jane Adams
50.0 10.00 L8765 Mary Lincoln
25.5 10.85 W7654 Martha Washington
52.0 15.75 A9876 John Adams
45.0 25.00 W1235 George Washington
40.25 55.00 L9087 Abraham Lincoln
30.0 9.75 T9876 William Tell
42.5 12.50 M7654 Missy Muffett
30.0 10.00 P8765 Peter Piper

and here is my code

Code:
#include <iostream>
#include <cstdio>
#include <fstream>
#include <string>
#include <iomanip>
using namespace std;
const int SZ = 55;
void tellUser();

[Code] .....

here are the errors the are giving

Code:
payroll.cpp: In function "int bubbleSort()":
payroll.cpp:52:8: error: "lastpos" was not declared in this scope
payroll.cpp:52:18: error: "numemp" was not declared in this scope
payroll.cpp:56:10: error: "swapmade" was not declared in this scope
payroll.cpp:57:16: error: "i" was not declared in this scope

[Code] ....