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Operating System Tutor

Ottawa, Canada

Elias M

PhD. in Programming, University of Calgary, Canada

Profession

Operating System Tutoring Professional

Skills

Operating system concepts getting your head spinning? You are not alone. Many students have always struggled with this area of computer science, often requiring professional help. I have been providing online operating system tutoring services to such students, enabling them to enhance their understanding of the underlying concepts and score better in this area. Throughout the period that I have worked as an online tutor, I have covered a wide range of operating system topics including I/O structure, storage hierarchy and structure, process scheduling algorithms, operating system services, CPU scheduling algorithms, and more. My proficiency in these topics, coupled with my unique approach to administering my sessions, have seen not one, not two, but hundreds of students achieve their desired academic goals. If you too would like to understand the basics of the operating system and score better this semester, go ahead and click the ‘hire’ button next to my profile.

Looping in C++

#include #include #include #include using namespace std; void dispInputScrTitle() { cout << "SHOW ME THE MONEY INC." << endl << endl; } void getEmpName(string& str) { cout << "Employee Full Name:\t"; getline(cin, str); cout << endl; } int getHoursWorked() { int hours; while (true) { cout << "Total hours worked:\t"; cin >> hours; if (cin.fail() || hours < 0 || hours > 100) { cout << "Please enter a valid number of hours." << endl; } else break; } return hours; } double getPayRate() { double pay_rate; while (true) { cout << "Employee's regular pay rate:\t"; cin >> pay_rate; if (cin.fail() || pay_rate < 6.5 || pay_rate > 32.00) { cout << "Please enter a valid pay rate." << endl; cin.get(); } else break; } cout << endl; return pay_rate; } int calcRegHrs(int hours) { if (hours < 40) return hours; else return 40; } int calcThHrs(int hours) { if (hours > 40 && hours <= 60) return hours - 40; else if (hours > 60) return hours - 60; else return 0; } int calcDblHrs(int hours) { if (hours > 60) return hours - 60; return 0; } double calcGrossPay(int hours, double pay_rate) { // get regular hours int reg_h = calcRegHrs(hours); // get time and a half int th_h = calcThHrs(hours); // get double pay hours int dbl_h = calcDblHrs(hours); return pay_rate * ((double)reg_h + 1.5*(double)th_h + 2 * (double)dbl_h); } double calcFedTaxOwed(double gross_pay) { return 0.06*gross_pay; } double calcStTaxOwed(double gross_pay) { return 0.03*gross_pay; } double calcFICAOwed(double gross_pay) { return 0.02*gross_pay; } double calcMedicareOwed(double gross_pay) { return 0.02*gross_pay; } double calcNetPay(double gross_pay) { double fed_tax = calcFedTaxOwed(gross_pay); double st_tax = calcStTaxOwed(gross_pay); double FICA_tax = calcFICAOwed(gross_pay); double medicare_tax = calcMedicareOwed(gross_pay); return gross_pay - fed_tax - st_tax - FICA_tax - medicare_tax; } void dispOutputScrTitle(string employee_name) { transform(employee_name.begin(), employee_name.end(), employee_name.begin(), ::toupper); cout << "SHOW ME THE MONEY INC" << endl; cout << "PAYROLL REPORT FOR: " << employee_name << endl; cout << endl; } void dispPayRep(int hours, double pay_rate) { // get regular hours int reg_h = calcRegHrs(hours); // get time and a half int th_h = calcThHrs(hours); // get double pay hours int dbl_h = calcDblHrs(hours); double gross_pay = calcGrossPay(hours, pay_rate); double fed_tax = calcFedTaxOwed(gross_pay); double st_tax = calcStTaxOwed(gross_pay); double FICA_tax = calcFICAOwed(gross_pay); double medicare_tax = calcMedicareOwed(gross_pay); double net_pay = calcNetPay(gross_pay); cout << "Total hours worked" <> input; if (input == 'Y' || input == 'N') { valid_option = true; if (input == 'N') run_program = false; } else cout << "Invalid option. Please enter Y/N." << endl; } cin.get(); } bool valid_option = false; char input; while (!valid_option) { cout << "Display summary report? "; cin >> input; if (input == 'Y' || input == 'N') { valid_option = true; if (input == 'Y') { dispSumScrTitle(); dispSumPayRep(total_employees, total_gross_pay, total_fed_tax, total_st_tax, total_FICA_tax, total_medicare_tax, total_net_pay); } } else cout << "Invalid option. Please enter Y/N." << endl; } }

Understanding subroutines in programming

#include using namespace std; int main() { while (1) { std::cout<< "Please enter a char: " <> c; c = tolower(c); int cd = c - '0'; int type = -1; if (cd >= 0 && cd <= 9) // digit type = 1; else if (cd == 49 || cd == 53 || cd == 57 || cd == 63 || cd == 69) // vowel type = 2; else if (cd >= 50 && cd <= 74) // consonant type = 3; else // any other character type = 4; switch (type) { case 1: // is digit cout<< "The character is a digit." <