Lab 3

Welcome to CS141 Lab 3 - Linux Fundamentals and Conditional Branches

Today’s lab is structured as follows:

• 1. 5 Mins - Quiz

  2. 10 Mins - Introduction to Linux Terminal and the g++ compiler

  3. 25 Mins - Lab exercise on conditional statements

  4. 10 Mins - Grading

Linux Tutorial

This is intended to be done on the projector alongside the instructor

Login to the Lab Machine using your CS Account Username and Password

Make a directory for CS141 by typing

>>mkdir CS141

See the directory you are in by typing

>>pwd

See the contents of that directory by typing

>>ls

Navigate to the CS141 directory by typing

>>cd/CS141

Can you make a directory for Lab 3?

Download the code stub provided for the lab exercise and store in the directory for Lab 3 using the GUI.

Navigate to your Lab 3 folder

Compile the code by typing

>>g++ lab2.cpp

The result is an executable file containing your program. Run the program by typing

>>./a.out

Lab Exercise

Playing Rock-Paper-Scissors is a critical skill in today’s world. The sport involves 2 players and three hand signals, rock (a closed fist), paper ( an open palm), and scissors (similar to a peace sign). A player is a winner when their symbol “beats” the opposing players. Rock-Paper-Scissors can be used to settle who gets the last slice of pizza or the rights to sell a multi-million dollar art collection.

The winning combinations are as follows:

For those just learning the game, losses can be disappointing. Your task is to program a game vs the computer where the USER ALWAYS WINS!

Start with the stub of code provided.

Program Execution Looks Like:

Welcome to CS 141 Rock-Paper-Scissors where

the user always wins and everything is awesome

Enter 1 for Rock

Enter 2 for Paper

Enter 3 for Scissors

Enter 4 to Quit

Select your implement: 1

Computer Selects: Scissors

You Win!

Select your implement: 2

Computer Selects: Rock

You Win!

Select your implement: 4

Bye!

#include <iostream>

using namespace std;

int main(int argc, const char * argv[]) {

   cout << "Welcome to CS 141 Rock-Paper-Scissors where\n" <<

   "the user always wins and everything is awesome" << endl;

   cout << endl << "Enter 1 for Rock\n" << "Enter 2 for Paper\n" <<

   "Enter 3 for Scissors\n" << "Enter 4 to Quit" << endl <<

   endl;

   int userSelection = 0;

   while(userSelection != 4){

       cout << "Select your implement: ";

       cin >> userSelection;

       // Your Code Goes Here

       // Step 1 : Implement with if-else statements

       // Step 2 : Implement with a switch-case statement

       cout << "You Win!" << endl;

   }

   cout << "Bye!\n";

   return 0;

}

Points:

0.   Did not show up or did not code with a partner

• 1. Compile code using g++ editor in the terminal window

  2. Implement the game using if-else statements

  3. Implement the game using a switch-case statement